Accelerate Definition and 191 Threads

  1. LarryS

    Accelerate an Uncharged Particle?

    Particle accelerators use EM to guide and accelerate charged particles to close to the velocity of light. Is it conceptually possible to build a particle accelerator to accelerate uncharged particles that have a non-zero rest mass? Thanks in advance.
  2. A

    Joules required to accelerate 1kg of mass

    Homework Statement how many joules of energy are required to accelerate 1 kg of mass from rest to a velocity of 0.866c? I tried the relativistic kinetic energy equation, but I feel like it's totally incorrect. Homework Equations KE = [(m0c^2) / √(1-v^2/c^2)] - m0c^2 E = KE + m0c^2...
  3. S

    Energy required to accelerate a mass

    Homework Statement 1-Calculate the energy (1/2 mv^2) for each of the following: a) a nova outburst that accelerate a mass of 1E-5 M_sun to a velocity of 1000 km/s Homework Equations 1/2 mv^2 The Attempt at a Solution Now, here's what I am unsure of. Do I just take the kinetic...
  4. P

    How does the creation of virtual particles allow the universe to accelerate?

    Based on theories of an accelerating universe, how can the creation and annihilation of pairs of particles/anti-particles (virtual particles) generate energy in a vacuum (space) thus contribute to Eintstein's theory of a cosmological constant (positive pressure). And if the quantum...
  5. D

    What Torque is Needed to Accelerate a Phonograph Album?

    1.How much torque is required to accelerate a phonograph album (75-g, 30-cm diameter 33.3 rpm) at 3-rad/sec2 2. T=I(alpha) 3. Sorry i have to idea on this one I am completely lost!
  6. S

    Required torque to accelerate a disk of a certain mass

    Homework Statement (Actually, this is not a homework, but a project I'm trying to accomplish but I have almost forgotten physics...) There is a disk weighting 100kg with a radius of 0.6 meters. What would be the torque needed to accelerate the disk from 0 rpm to 6 rpm in 10 seconds...
  7. E

    Equal and Opposite variable forces on a mass - does it accelerate?

    [b]1. A mass is attached to a spring that is mounted on the end of an air track. The mass is pushed by your hand along the track, providing a force, F hand. The spring provides a force on the mass, F spring, equal to F hand but opposite in direction. Assume (frictionless?) air track is being...
  8. P

    Pulleys - find force to accelerate a block

    Homework Statement A force F acts to the right on a 5.65 kg block. a 2.29 kg block is stacked on top of the 5.65kg block and can slide on it with a coefficient of friction of .15 between the blocks. The table has a coefficient of friction of .18. G= 9.8 m/s^2 system is in equilibrium Find...
  9. R

    Thrush required to hover, take off and accelerate?

    thrush required to hover, take off and accelerate? i need equations to figure out the following how much force is required to accelerate a mass. ie knowing either the mass or pounds of force, how to figure out acceleration curve, basically I am trying to figure out how much force(thrust) is...
  10. S

    What force is needed to accelerate a car

    Homework Statement What force is needed to make a 1200kg vehicle accelerate from rest to 108km/hr in 100m Homework Equations aceleration = Velocity/time Force = Mass x Acceleration Time = Distance/Velocity The Attempt at a Solution M = 1200kg D = 100m V = 108 km/hr /...
  11. J

    Power needed to accelerate a chain.

    I'm not a student, but this seemed like the correct place to put a question. I need to know how much power it takes to accelerate a motorcycle chain weighing 1 pound in 1 second to a speed that would equal 20mph at the wheel from a dead stop. The wheel has a diameter of 20 inches. The...
  12. S

    Why can't gravity accelerate an object past c?

    The fact that it is impossible to accelerate an object to (or past) the speed of light is typically explained as connected to the relativistic increase in inertial mass that occurs with increasing velocity; eg., for any given force, the acceleration produced by that force will decline as the the...
  13. I

    How to accelerate the SVD algorithm?

    I've written a program in c language in terms of the GR SVD algorithm. To my dispointment,its performance is worse than the svd of matlab. I wish to get to know which algorithm the MATLAB used. Who may tell me? Thanks.
  14. M

    Force needed to accelerate electron

    1. What force is needed to give an electron an acceleration of 1.00*10^10 meters per second2? 1) 9.11*10^-41 N 2) 9.11*10^-31 N 3) 9.11*10^-21 N 4) 1.10*10^43. I used electron's mass times acceleration, but non of these is the answer. 2. Two concurrent forces of 6 Newtons and 12 Newtons...
  15. N

    On the speed of light, accelerate toward mass

    Hi, First of all let me clarify, I understand that nothing with mass can move at the speed of light or higher. I have come across a question I was asked which I was unable to answer fully and would like to understand myself. The usual questions like "If you imagine a rocket with an engine...
  16. A

    Can we accelerate particles to arbitrarily high energies?

    Is it possible in principle to accelerate particles to arbitrarily high energies? Suppose technology is no bar and there is sufficient money to build accelerators. Can we accelerate particles beyond say Planck energy? or is there is some limit? For example from special relativity we know that to...
  17. F

    Power needed to accelerate up incline

    Homework Statement a vehicle of mass 200kg accelerates from rest up to 40km/h in 15seconds up an incline of 1 in 8. The resistance to motion can be considered to be in two parts, the first being due to friction and constant at 50 N/tonne with the second part being due to air resistance and...
  18. A

    How much work was done by a force to accelerate a block

    Is this right? A block of mass 1 kg is acellerated from an initial speed of 2 m/s to a final speed of 6 m/s as it is dragged a distance of 10 m over a level floor. If the coefficient of kinetic friction between the block and the floor is 0.2, how much work must the be done by the applied...
  19. M

    How much tension must a rope withstand if it is used to accelerate a 1400 kg car

    [SOLVED] Rope Forces Homework Statement How much tension must a rope withstand if it is used to accelerate a 1400 kg car vertically upward at 0.50 m/s2? Homework Equations F=ma The Attempt at a Solution Well i know that the force going up is going to be 700 N and i need to...
  20. I

    Do photons have to accelerate to the speed of light

    i have just a question that came to my mind. do photons have to accelerate to the speed of light every time a light bulb is turned on?
  21. R

    How long did this car accelerate

    Hello I need help with a question i am doing: A car accelerates at 2.4ms^-2 until it reaches a speed of 16ms^-1 how long did it accelerate for? and what distance did it travel while accelerating? could someone please help me... Thanks Ryan
  22. C

    Hot Objects Don't Always Accelerate - Puzzling Physics Explained

    was just watching this video(The joy of science) on thermodynamics, and the proffesor of the video said "hot objects don't always accelerate." this went against what i previously thought. tried googling it but couldn't find an answer. i don't know how to picture this. how?
  23. C

    A: Calculate Ferlini's acceleration = 12.3 m/s / 0.16 s = 76.875 m/s^2

    1. Q: "John slides down on a hill on his toboggan. He starts from rest and speeds up to 18.0 km/h in 8.0 s. Find his acceleration in m/s^2." A: Convert 18.0 km/h to m/s^2 = 18.0 km/h(0.2778) = 5.00 m/s a=v/t = 5.00m/s / 8.0s = 0.63 m/s^2 2.Q: Explain how you can accelerate without speeding...
  24. S

    Chosing to stop or accelerate through a traffic light

    [b]1. A person driving her car at 47 km/h approaches an intersection just as the traffic light turns yellow. She knows that the yellow light lasts only 2.0 s before turning to red, and she is 30 m away from the near side of the intersection (Fig. 2-29). Should she try to stop, or should she make...
  25. M

    Tension on a Rope if used to Accelerate a car?

    Homework Statement A car is driven 100 km west and then 95 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)? ________ km ________ ° south of west Homework Equations none? I apologize if I am overlooking any equation, but there are no...
  26. B

    How Much Force Is Needed to Accelerate a 35kg Mass Up a 25 Degree Incline?

    i have a question on what fromula i would need to do this problem i have been trying for thje last half hour and have come up with little to nothing What force would be needed to accelerate a 35 kg mass up a 25 degree incline at 3 m/s/s if the coefficient of friction is .11? i drew a FBD...
  27. M

    Is not possible the magnetic field to accelerate charges?

    If we have a moving particle in a magnetic field the work of the magnetic field is always zero? Is not possible the magnetic field to accelerate charges?
  28. C

    Torque whatmakes a car accelerate

    For a car that is accelerating to the right, I don't understand for if the tyre is rotating clockwise, the force is acting to the right. http://www.welltall.com/ymc/discovery/car/wt_xfer.html From the diagram, in the above web site, the direction of Ff and Fr are to the right. For...
  29. C

    How Does Newton's Third Law Explain Acceleration in Cars?

    The force acting on a car in vertical direction cancel out(the gravitational force and the normal force) such that it doesn't move in vertical direction. If the car were to move to the right on a road, we are supposed to provide a force to the car by imagining that we can use our hands to...
  30. J

    Refraction, Why does the light re accelerate?

    OK, so i think i get why refraction happens and it makes sense that as the light passes into something of a higher refractive index it will decelerate and if it hits at an angle, one "edge" of the beam will hit first and thus descelerate before the other side of the beam causing the beam to...
  31. P

    Determine the energy required to accelerate a car

    energy problem... I got a problem that goes likethis: Determine the energy required to accelerate a 1300 kg car from 10 to 60km/h on an uphill road with a vertical rise of 40m. Ok i know that work is the itegral of force which is ma. But what about this vertical rise of 40m? Does this...
  32. M

    If a magnetic field is increasing, will a charge in that field accelerate?

    I don't know what would happen.. Fm = qvBsin(theta) If B is increasing, will velocity of a charge increase? Or will only its radius decrease? Or both? Fc = Fm mv^2/R = qvB mv/qR = B anyone know? *acceleration was a bad choice of wording :) I mean will velocity increase..
  33. J

    Calculate the energy to accelerate and decelerate a leg

    In one model of jogging, the energy expenditure is assumed to go into accelerating and decelerating the legs. If the mass of the legs is m and the running speed is v*, calculate the energy to accelerate and decelerate a leg. Assume that each leg starts in each step at a velocity v = 0 and...
  34. K

    Does my spaceship accelerate forever?

    Lets assume I create a spaceship that is powered by vacuum energy which gives the spaceship an unlimited fuel supply. I leave Earth at full power and remain at full power forever. I have an accelerometer mounted to the dash just below the fuzzy dice. Will my accelerometer measure my ship...
  35. Loren Booda

    Is the Speed of Light Really Constant?

    If photons can follow a curved trajectory, may they be considered to accelerate in a (generally) relative manner?
  36. G

    Torque needed to accelerate Earth

    Calculate the torque required to accelerate the Earth in 3 days from rest to its present angular speed about its axis I got that the Earth's mass is 5.98 X 10^24 kg and its radius is 6.38 X 10^6 m. I used that the Earth is solid sphere with a moment of inertia of: I = 2/5*M*r^2 so then...
  37. E

    Does Accelerating at Higher Speeds Require More Energy?

    OK. I have a problem. I've just started taking physics (1 month) so for more experienced physicists this should be simple. The kinetic energy of an object is: KE = 1/2*m*v^2 Right? This means that a spaceship would use a lot more energy to accelerate from 100m/s to 105m/s than it would do...
  38. J

    Protons to accelerate a space probe

    Okay ppl, I have a question, I'd just like you to check that my working here is correct. Q: A space probe of mass m=490kg is driven by an ion propulsion motor that involves the use of positive ions, each of mass m=2.18*10^-25 kg and having a charge of magnitude e=1.6*10^-19 C. These ions...
  39. C

    Energy required to accelerate a ship WITH ANTIMATTER

    Energy required to accelerate a ship.. WITH ANTIMATTER! Hey, I was reading a science fiction book that had lots of fast pitched space battles, ships manoeuvring around at 8 gees and stuff, powered by antimatter :P . So I was wondering, let's say you had a ship with a mass of 1000 tonnes.. how...
  40. Antonio Lao

    Can Photon Accelerate in Vacuum?

    It cannot because the speed of photon is a constant in vacuum. So it also cannot deccelerate in vacuum.
  41. P

    Electric Field Required to Accelerate Electrons in Television Tube

    The electron gun in a televeision tube is used to accelerate electrons (mass of 9.10939 x 10^-31 kg and charge of -1.60218 x 10^-19 C) from rest to 2 x 10^7 m/s within a distance of .053 m. What electric field is required?
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