Jump Definition and 323 Threads

Julia is a high-level, high-performance, dynamic programming language. While it is a general-purpose language and can be used to write any application, many of its features are well suited for numerical analysis and computational science.Distinctive aspects of Julia's design include a type system with parametric polymorphism in a dynamic programming language; with multiple dispatch as its core programming paradigm. Julia supports concurrent, (composable) parallel and distributed computing (with or without using MPI or the built-in corresponding to "OpenMP-style" threads), and direct calling of C and Fortran libraries without glue code. Julia uses a just-in-time (JIT) compiler that is referred to as "just-ahead-of-time" (JAOT) in the Julia community, as Julia compiles all code (by default) to machine code before running it.Julia is garbage-collected, uses eager evaluation, and includes efficient libraries for floating-point calculations, linear algebra, random number generation, and regular expression matching. Many libraries are available, including some (e.g., for fast Fourier transforms) that were previously bundled with Julia and are now separate.Several development tools support coding in Julia, such as integrated development environments (e.g. Microsoft's Visual Studio Code, with extensions available adding Julia support to IDEs, e.g. providing debugging and linting support); with integrated tools, e.g. a profiler (and flame graph support available for the built-in one), debugger, and the Rebugger.jl package "supports repeated-execution debugging" and more.

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  1. L

    How Do You Calculate the Takeoff Speed in a Long Jump Problem?

    Homework Statement A long jumper leaves the ground at an angle of 23 degrees and travels through the air for a horizontal distance of 8.7m before landing. What is the takeoff speed of the jumper? Homework Equations Trigonometric functions ? The Attempt at a Solution Recently...
  2. X

    How does an Electron 'jump' from one orbit to the other?

    Well, the question is that what happen when an electron changes orbits? if it cannot have states in between those orbits, how can it 'move through' those restricted areas? Do the go through those states? or just disappear and reappear without any time lapse, at two different places?? please...
  3. J

    Solving for Launch Speed: Cal & Henry's Sled Jump

    Homework Statement Cal and Henry are riding on a sled. They are trying to jump the gap between two symmetrical ramps of snow separated by a distance W . Each ramp makes an angle θ with the horizontal. They launch off the first ramp with a speed VL. Cal, Henry and the sled have a total mass m...
  4. O

    Projectile motion motorcycle jump over cliff

    a motorcyclist jumps off a cliff inclined at 53.0 degrees over a river that is 40.0m wide. the far bank is 15.0m lower than the edge of the take off ramp. the river itself is 100m below the ramp. Ignore air resistance. What should his speed be at the top of the ramp to just make it to the edge...
  5. P

    Flying Ski Jump: Exploring Distance and Speed

    Homework Statement In a flying ski jump, the skier acquires a speed of 110 km/h by racing down a steep hill and then lifts off into the air from a horizontal ramp. Beyond this ramp, the ground slopes downward at an angle of 45 degrees. (a) Assuming the skier is in a free-fall motion after he...
  6. B

    Calculating Jump Landing Position

    Hi, I need a bit of help with the following: I need to calculate the landing position of a man if he jumped, using his speed, gravity and jump height. This needs to be done in 3D-space. I would use the template, but I really don't know where to start. I imagine it's something to do with...
  7. R

    Grasshopper Jumps Between Two Cars Before Collision

    Homework Statement Two cars start 200 m apart and drive toward each other at a steady 10 m/s. On the front of one of them, an energetic grasshopper jumps back and forth between the cars (he has strong legs!) with a constant horizontal velocity of 15 m/s relative to the ground. The insect...
  8. R

    Measuring average power during a jump

    Homework Statement At your disposal are a scale and a measuring tape. You are not allowed to jump on the scale. How would you go about measuring the average power you exert on the floor?Homework Equations P_{average}=\frac{\Delta E_{tot}}{\Delta t}The Attempt at a Solution I am honestly lost...
  9. P

    Long Jump problem with only distance and height given

    Homework Statement [PLAIN]http://img199.imageshack.us/img199/2586/physicshelp.jpg 1. What is the time interval between the initial jump and when the center of mass reaches the maximum height? 2. Average horizontal velocity during the jump. 3. The time interval between the time when the...
  10. I

    How much force or speed is needed to jump

    How fast does something need to accelerate in order to jump? Say a weight of 100 lbs, or kg's, etc.
  11. F

    How powerful would super jump shoes have to be?

    how powerful would "super jump shoes" have to be? I was just wondering, if there were "super jump shoes", that would hit on the ground and would propell you upwards, how powerful would those shoes have to be? I was hoping that you could use poweful magnets to do it. If you put like ends of...
  12. Ivan Seeking

    Cardio Jump - the ropeless jump rope

    http://www.buythecardiojump.com/Default.asp?tcode=pi8&tag=google&gclid=CI-o0orY5ZkCFQkzawodGFudQg&bhcp=1 :smile::smile::smile::smile::smile: I don't know what can be said. Maybe its a Zen thing.
  13. J

    If I jump from height of 5ft to ground -what is g-force of impact

    I jump off a high bench (5ft high) to the ground. What is the g-force of the impact and how do you calculate it. It seems mass is irrelevant for this Joe
  14. Y

    Maximizing Motorcycle Jump Height: Solving for the Optimal Speed

    A daredevil on a motorcycle leaves the end of a ramp with a speed of 42.0 m/s as in the figure below. If his speed is 39.8 m/s when he reaches the peak of the path, what is the maximum height that he reaches? Ignore friction and air resistance. So v0=42.0m/s and vf=39.8m/s...what equation am...
  15. Y

    Jump discontinuity with fourier series

    Hi all, I couldn't find any proof of the following statement: The Fourier series expansion of f(x), which has a discontinuity at y, takes on the mean of the left and right limits i.e. f(y)= (1/2)(f(y+)+f(y-)) is there anyone who can help me? Thanks
  16. Z

    Bungee Jump relating to force question

    Homework Statement A bungee cord is 30.0 {\rm m} long and, when stretched a distance x, it exerts a restoring force of magnitude kx. Your father-in-law (mass 100 kg) stands on a platform 45.0 {\rm m} above the ground, and one end of the cord is tied securely to his ankle and the other end to...
  17. C

    Long Jump Question - Net forces

    Homework Statement A Long-Jump Contestant experiences at the instant of landing, a gravitational force of 538N [Downwards], and a force applied by the ground to the feet, of 6382N [28.3 degrees above the horizontal] (The answer is given in the book, being 6.15 X 10^3 N [23.9 Degrees above...
  18. G

    Need a Camera for Cute Kitten Pics?

    http://www.break.com/index/kitten-attempts-epic-jump.html Ha
  19. J

    How Far Does a Skier Jump at 15° Launch and 50° Slope?

    Homework Statement A skier leaves the ramp of a ski jump with a velocity of v = 8.0 m/s, θ = 15.0° above the horizontal, as in the figure. The slope is inclined at 50.0°, and air resistance is negligible. (Assume up and right are positive, and down and left are negative.) (a) Find the...
  20. M

    Studying When do you make the jump from textbook to original ideas?

    So far, I'm pretty happy with my education. I feel like I'm understanding things as well as they are presented and developing insight into physics and engineering, but my college seems to think that their degrees speak for themselves and if you grind through their classes, you will automatically...
  21. L

    Daredevil Robbie Maddison completes Vegas jump

    Here's a little physics in action to bring in the new year. http://www.smh.com.au/news/world/robbie-maddison-completes-vegas-jump/2009/01/01/1230681649061.html His runway speed was 54 mph. About 24 m/s. Figuring that V² = 2gh that translates to about 97.5 feet of potential energy. The Vegas...
  22. T

    Jump Start Bicycle Freewheel Cog: Simple & Robust Designs

    Hello I need a method of locking a freewheel cog at the back wheel of a bicycle. Have motorized bicycle. It has a chain from the engine to an overrun cog on back wheel. The engine will only be used intermittently, about 10% of the time. I need to jump start the engine often, but I need as...
  23. P

    Finding the Initial Velocity for a 0.8m Volleyball Jump

    Homework Statement In order for a volleyball player to jump vertically upward a distance of 0.8 meters, his initial velocity must be?Homework Equations s=v0t + .5at2 vf= v0 + atThe Attempt at a Solution I missed the question the other day on a practice and it has been forever since I messed...
  24. F

    How to Calculate Maximum Jump Height with Given Variables

    Homework Statement A 73 kg high jumper leaves the ground with a vertical velocity of 7.6 m/s. How high can he jump? The acceleration of gravity is 9.8 m/s^2. Homework Equations mgh1 + 1/2mv1^2 = mgh2 + 1/2mv2^2 The Attempt at a Solution 0 + 1/2(7.6)^2 = 9.8(h2) + 1/2(v2)^2...
  25. A

    Solve Bungee Jump Issue: Derive Expression for x Double Dot, Show mg >= kh/4

    Homework Statement Typical bungee jumper. Rope has natural length h, spring constant k, man has mass m. The safety limit for the max acceleration of the man is 3g. Derive an expression for x double dot, and show mg *greater or same than* kh/4 Homework Equations Well I'm sure everyone...
  26. T

    Where do electrons go while making a quantum jump?

    I've always wondered this. Hopefully someone one knows. I always read the electrons jump, but they never say through what. thanx
  27. thenewmans

    Quantization of Color: Electrons Jump Between Orbits

    Is there any paper on the quantization of color? Maybe not since it’s obvious. I always thought that color was on a continuum. But now I realize that electrons jump between a limited set of orbits.
  28. K

    What Are the Physics Behind Bungee Jumping?

    Hi everyone! I am recently doing an assignment for my broadening course. But I really don't know how to answer these questions as I only have basic knowledge for physics. Could anyone help me out? The questions are as follow: 1. Explain why iron chain is not used as bungee jump string instead...
  29. S

    Jump In The Capacitor Voltage?

    I know that voltage of a capacitor is continuous. However, I want to learn that; can it be a jump in the capacitor voltage? Also, if it is, how it can be happened?
  30. C

    Calculating the Maximum Displacement of Kate's Bungee Jump

    Homework Statement Kate, a bungee jumper, wants to jump off the edge of a bridge that spans a river below. Kate has a mass (m) , and the surface of the bridge is a height (h) above the water. The bungee cord, which has length (L) when unstretched, will first straighten and then stretch as Kate...
  31. R

    How do I determine where a function has a removable and a jump discontinuity?

    Homework Statement I am given the following function, piecewise: f(x) = (-x+b) (x<1) 3 if x=1 (-12/(x-b))-1 (x>1, x=/b) I am asked: 1) For what value(s) of 'b' does 'f' have a removable discontinuity at 1? 2) For what...
  32. M

    How High Can a Salmon Jump if It Leaps at 2.5 Meters Per Second?

    Homework Statement If a salmon swims straight upward in the water fast enough to break through the surface at a speed of 2.5 meters per second, how high can it jump above water? Homework Equations i don't know, because all i know is speed. The Attempt at a Solution is...
  33. P

    Frictionless Ski Jump at an angle

    Homework Statement Sam (65 kg) takes off (from rest) up a 50 m high, 10° frictionless slope on his jet-powered skis. The skis have a thrust of 260 N. He keeps his skis tilted at 10° after becoming airborne, as shown in Figure P6.43. (Figure attachment not working- it's basically just drawing...
  34. P

    Gravity and Vertical Jump Problem

    Homework Statement Imagine that you are prospecting for rare metals on a sperical asteroid composed mostly of iron (which density is 7800 kg/m^3). The radius of the asteroid is about 4.5 km. You've left your spaceship in a circular orbit 400 meters above the asteroid's surface and gone down to...
  35. C

    Does this jump honor the concept of physics?

    Does this jump honor the concept of physics?? http://www.youtube.com/watch?v=2YMQR13ia... -James Bond: Casino Royale Explain what is wrong with the action scene and how the segment should be modified so that it honors the laws of physics. The only thing I can think of is that the...
  36. W

    Which way does a high voltage spark jump?

    Hello All! Quick question... When a high voltage capacitor is charged to say 3000 volts, a spark will jump across the terminals. Does the spark jump from the positive to negative terminal, or from negative to positive? Thanks Very Much! Bill
  37. M

    What Is the Optimal Jump Angle for a Long Jumper?

    An athelite wireless gaurate a long jump,at what angle he should jump?
  38. M

    Me, Thinking About A Jump and A Fall

    Hi all. I had grade 11 physics so I know the basics on physics.. grade 12 comes later this year... Anyways I was thinking about the systems in a jump, and the motion involved and I know motion physics work and all so don't get me wrong :P I'm not trying to disporve something here... I just know...
  39. B

    Velocity to jump building to building

    Homework Statement "In a chase scene, a movie stuntman is supposed to run right off the flat roof of one city building and land on another roof 1.6 m lower." "If the gap between the buildings is 4.5 m wide, how fast must he run? " Homework Equations Vf^2 = V0^2 + 2a (Xf-X0) This...
  40. B

    Calculating the Height of a Flea's Jump Using Basic Physics Principles

    Homework Statement I did this problem in my book, then checked the answer, and it showed what must be a typo for answer a (acceleration should be m/s^2 not m/s), and answer c just makes no sense. "When jumping, a flea reaches a takeoff speed of 1.0m/s over a distance of 0.50mm." a. What...
  41. P

    How High Can a Flea Jump Using Resilin Energy?

    The resilin in the upper leg (coxa) of a flea has a force constant of about 26 N/m, and when the flea cocks its jumping legs, the resilin in each leg is stretched by approximately 0.10mm . Given that the flea has a mass of 0.55mg , and that two legs are used in a jump, estimate the maximum...
  42. J

    Solving the High Jump Velocity Puzzle

    I have a problem. I think that I am just not seeing it the right way. "A high jumper leaves the ground at a 27degrees and lands 7.8 m away. What is the initial velocity. Every formula I have keeps giving me two variables.
  43. H

    Projectile locust jump question

    Large insects such as Locusts can jump as far as 75 cm. on a level surface. an entomologist analyzed a photograph and found that the insects's launch was at an angle of 55. What was the initial velocity of the insect? those are the only givens I am given... how do i figure this one out? Even...
  44. A

    Calculating Spring Compression from 1m Jump on Scale

    If you stand on a bathroom scale, spring inside compresses .6mm, and tells your weight is 710 N. Now if you jump on the scale from a height of 1m, what does the read at it's peak? This is what I tried to do: I used Hooke's law: F_{}s= k*x and solved for the k which is spring constant...
  45. O

    Ski Jump Problem: Find the Distance Down the Slope

    A ski jumper leaves the end of the ski jump headed upward along a parabolic trajectory. He reaches his peak height 10 meters beyond the end (horizontal distance) and ten meters above it (vertical distance). The ski slope falls away from his departure point in a straight line 45 degrees below...
  46. T

    Determining Vertical Jump Height from Average Velocity

    I am a coach for athletes in various sports and have a problem that I can't figure out, but I'm hoping will be easy for someone here. I am looking to determine the height of a vertical jump from some limited information via an accelerometer. The accelerometer is attached near the center of...
  47. R

    Kate's Bungee Jump: Calculating Distance Below Bridge

    Homework Statement Kate, a bungee jumper, wants to jump off the edge of a bridge that spans a river below. Kate has a mass m, and the surface of the bridge is a height h above the water. The bungee cord, which has length L when unstretched, will first straighten and then stretch as Kate falls...
  48. K

    Is Momentum Conserved with Just the Ball and Player in a Jump Ball Scenario?

    A basketball is tossed up into the air, falls freely, and bounces from the wooden floor. From the moment after the player releases it until the ball reaches the top of its bounce, what is the smallest system for which momentum is conserved? Here are some choices given... - momentum is...
  49. N

    Standing broad jump on the moon

    i am having trouble with this exercise, i don't understand much and the professor doesn't explain too well so I am kinda lost. Consider a person on the moon who launches herself into a standing broad jump at 45 degrees. The average force generated during launching is, F = 2W and the...
  50. G

    Calculating the Final Height of Chris's Bungee Jump

    Homework Statement Chris jumps off a bridge with a bungee cord tied around his ankle. He falls for 15m before the bungee cord begins to stretch. Chris's mass is 75kg and we assume the cord obeys Hooke's law F = -kx, with k=50N/m. If we neglect air resistance estimate how far below the bridge...
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