Jump Definition and 323 Threads

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[SOLVED] The Flea Homework Statement A flea, jumping with its highest possible initial speed, can jump to a maximum vertical height of 1 cm. What is the time spent in the air by the flea during the vertical jump? What would be the time spent in the air if the flea were instead to leave the...

[SOLVED] Just Checking Homework Statement In this problem, you will apply kinematic equations to a jumping flea. Take the magnitude of free-fall acceleration to be 9.80 . A flea jumps straight up to a maximum height of 0.550m . What is its initial velocity Vsub0 as it leaves the ground...

hey guys imm new here i got a question in my book i can't figure out it says: an athlete executing a long jump leaves the ground at a 30 degree angle and travels 7.80m (a) what was the takeoff speed? (b) if this speed were increased just 5.0 % how much longer would the jump be? anyone...

An athlete executing a long jump leaves the ground at a 40° angle and travels 6.30 m. a) what was the take off speed? b) If the speed was increased by just 4.0 percent, how much longer would the jump be? ** i used squareroot of 2ax to find initial velocity and got 8.91 m/s but got it...

A skier (m=59.00 kg) starts sliding down from the top of a ski jump with negligible friction and takes off horizontally. If h = 7.70 m and D = 12.90 m, find H. img:http://i242.photobucket.com/albums/ff106/jtdla/prob21a.gif I was given a hint to treat the skier as a projectile, so I broke...

Homework Statement A kangaroo jumps to a vertical height of 2.3 m. How long was it in the air before returning to Earth? Homework Equations kinamatics The Attempt at a Solution i got .68 which i think is rite but i don't know what do you get?

how deep would it have to be proportionally to how far you fell?

Homework Statement A bungee jumper needs to calculate how much bungee cord to attach to herself so that it will bring her to rest 3m above ground. The spring constant of the bungee cord is 22 N/m, and she has a mass of 55kg. Neglect the bungee cord's mass. a. How long a bungee cord is...

A friend of mine who has a lot of experience with aircraft tells me the following:- His premise seems to be that something changes when your feet are off the floor. I think what he is saying is incorrect and that the distance jumped will be the same in either direction as the whole...

if a man is standing on a point "A" inside a train moving at a very high speed then he jumped . will he land on the same point A?

Homework Statement When jumping, a flea reaches a takeoff speed of 1.1 over a distance of 0.49 . How long does the acceleration phase last? What is the flea's acceleration during the jump phase? If the flea jumps straight up, how high will it go? (Ignore air resistance for this...

when some energy is suplied to an electron in a higher energy level E2 then how come it drops down to a lower energy level E1 but as per our knowlwdge of physics...it should jump to a higher energy level E3.

Three High Schools—Washington, Lincoln and Roosevelt— competed in a track meet. Each school entered one man, and one only, in each event. Susan, a student at Lincoln High, sat in the bleachers to cheer her boyfriend, the school's shot-put champion. When Susan returned home later in the day, her...

A. Here is the stated inquiry: A man jumps to a vertical height of 2.7 m. How long was he in the air before returning to Earth? B. Equations used: Y = Yo + VoT + (1/2)gT2 (Y because motion is in the vertical direction) C. Attempted solution: Because the total...

I'm 230lbs and I jump about 36 inches, if I were to lose 50lbs and get down to 180lbs and let's assume I don't lose any strength in my legs.. how would I calculate how much higher I would be able to jump. I wrote some stuff down and I got the jump would increase by the same percentage of %...

In the high jump, the kinetic energy of an athlete is transformed into gravitational potential energy without the aid of a pole. With what minimum speed must the athlete leave the ground in order to lift his center of mass 1.55 m and cross the bar with a speed of 0.70 m/s I have tried...

1) I am asked to find the rate of radiation emitted from a charged particle with constant velocity moving through a magnetic field at an angle and then with an added parallel electric field. I know how to do it without the fields and just the point charge, I just don't know how to factor in the...

A 78 kg skier starts from rest at a height of H = 29 m above the end of the ski-jump ramp (Figure 8-39). As the skier leaves the ramp, his velocity makes an angle of 28° with the horizontal. Neglect the effects of air resistance and assume the ramp is frictionless. (a) What is the maximum height...

Hey, I know this is probably a basic question but I've always been more into biology and only got into physics in the past 2 or 3 months. I'm having touble understanding the relationship between particle/wave duality of an electron and its jump from one state to another. how does this...

Homework Statement A star in the long jump goes into the jump at 12 m/s and launches herself at 20.0 degrees above the horizontal. How long is she in the air before returning to Earth? (g=9.81 m/s2) Homework Equations first I look for the v0(cos) and then I look for vfy= v0(sin) I...

Surprisingly, very few humans can jump more than 2 feet (0.6 m) straight up. Solve for the time one spends moving upward in a 2-foot vertical jump. Then double it for the "hang time" - the time one's feet are off the ground. b) Calculate the vertical height of Michael Jordan's jump when he...

If everyone else jumped off a bridge... http://news.yahoo.com/s/ap/20061021/ap_on_re_us/bridge_day_death :devil:

i was wondering how you find out how high a bungee jumper will rebound back up after his first jump

Hi, I need help with this question At a publicity event, Ayida, a stuntperson, will jump out of a helicopter with a jetpack on her back. The jetpack allows her to achieve a net upward acceleration of 4.4m/s^2 for a single interval of maximun length 10s. Ayida wants to time the use of the...

Hi, I am not sure how to go about this problem. Any help would be very appreciated. A flea can jump a vertical height h. What is the maximum horizontal distance it can jump? Thank you.

Here with a question, and I'm a bit crunched for time. I'm also here to learn, too. A basketball player, standing near the basket to grab a rebound, jumps 76.0 cm vertically. How much total time does the player spend (a) in the top 15.0 cm of this jump and (b) in the bottom 15.0 cm? Does this...

An athlete executing a long jump leaves the ground at a 30 degree angle and travels 7.80m. (a). What was the takeoff speed? (b). If this speed were increased by just 5.0 percent, how much longer would the jump be? I'm having some troubles with part a. I've been struggling to comprehend...

Suppose that after walking across a carpeted floor you reach for a doorknob, and just before you touch it a spark jumps 0.2 cm between your finger and the doorknob. Find the minimum voltage difference betwen your finger and the doorknob for this to occur. I did V=Ed which I plugged in...

I have what probably sounds like a simple question...here it is: You desperately want to qualify for the Olympics in the long jump, so you decide to hold the qualifying event on the moon of your choice. You need to jump 7.52 m (and conveniently beat Galina Chistyakova's record) to qualify...

a bungee jumper stnd on a bridge of 100m above the floor of a valley. She is attached to a bungee rope of length 25m and has a mass of 60kg. and i have taken g to be 10 Theres no: air resistance damping in the bungee rope and the weight of the bungee rope is...

I am at loss to understand (from a layman's point of view...with some math-stuff, too) how an element's electron(s) can jump the quantum fence. An element, any element, as shown on the periodic table, has certain characteristics within its 'earthly' domain, the 3-D world we live in. What causes...

I have seen many of these phenomenon before that is when someone throw a stone to the water , the stone can jump out of water for several times before it drop to the water . I know it is due to surface tension of water .How do I know that what speed and what angle I need to throw the stone in...

You go bungee jumping from a bridge that is 100m above a river, the bungee cord has an unstretched length of 50m and a spring constant of k=700 N/m You have a mass of 45kg. 1. How fast are you falling when you just start to stretch the cord and how long does it take to reach this point? 2...

How many time take to the electron to "Travel" from a lower orbit to a higher one? does it take the same time to travel to the next energy lever or to jump 3 or 4 when hitted by a more energetic photon?? Or it only takes a Planck time since it was hit by the photon?

<i>An exceptional jumper could reach a vertical height of 0.75m. What force must a 75kg person exert to achieve this height? (assume the person crouches 0.30m to jump).</i> Okay, I know that what I'm going to have to start with: y = viy * t + 0.5 * g * t^2 to find max height at some...

:confused: At the moment I'm qualified in the creative industry (Graphic Design) and I absolubtely despise it...my reason for choosing this route was part lack of guidance...being an accurate drawer ...knowing the right software beforehand...and some insane (and completely ignorant) notion that...

Why in the world would you hook the two positive terminals up, and then you put 1 side of the wire on the negative and the other on the car... I don't get this. I would think that if you had them directly set up so 1 wire goes from negative to positive and the other wire goes from negative to...

I would really like to know if this is really true. Please also read by the [more info]

Ok :smile: , I had to test my maximum vertical jump. I did three trials and here's what I got: -Maximum standing height (ie without jumping reaching with one hand) = 221.5 cm -Maximum jumping height with one hand (best of three) = 270 cm -Net Height 270-221.5 cm = 48.5 cm, 0.485m My...

Would somebody be able to go over my answers to this question. There are a couple of them that I am not sure of. Thank you! A 100kg baseketball player can leap straight up in the air to a height of 80cm. You can undersdand how by analyzing the situation as follows: a. The player bends his...

Hie all, curently i working on a mini project which require us to design a bungee jumping game where we had to decide all the data by myself. here i got a few question want to ask n hope someone can help me a bit.. a) how to calcualte the rebound force and distance he will rebound??as i...

Why did gas jump $.4 when hurricane Katrina hit, when it only removed 5% of what we produce, and MUCH less of what we use? If it hits Texas, how much of our gas production will be lost? Will it justify a $3 dollar jump in price?

a kangaroo jumps to a vertical height of 2.8m. how long was it in the air before returning to earth. I'm clueless on how to solve it. can someone help me please? thanks in advance d=2.8m a= -9.8 m/s^2 (since it's going the opposite direction of gravity, right?) i was wondering how...

Astronauts on the Moon can jump so high because 1) they weigh less there than they do on Earth. 2) their mass is less there than it is on Earth 3) there is no atmosphere on the Moon I believe the correct answer is 1, because they weigh less. Choice 2 has got to be wrong since mass...

A person takes the elevator to the 86th floor of the Empire State Building, jumps off and freefalls all the way to the street below. He walks away uninjured. How can this be?

Please, say me what are shear forces. I've been looking for it because I was studying a phenomenon called hydraulic jump. In this example, are these forces caused by the cohesion forces?

Hello, could someone please help me out with the following question. Q. A person suggests that if you are in lift, which is falling due to the connection cable having previously snapped, you can avoid injury by jumping up just prior to the lift's impact with the ground. Comment on the...

So if F=ma and the Earth's gravity provides a constant acceleration then why would I die if I jump out of an airplane but not if i jump off a 10 foot ledge? I'm sorry if this is a stupid question but it's been several years since I was in a physics classroom.

Okay, here's the deal: Basketball player Darrell Griffith is on record as attaining a standing vertical jump of 1.2 m (4 ft). (This means that he moved upward by 1.2 m after his feet left the floor.) Griffith weighed 890 N (200 lb). (B) If the time of the part of the jump before his feet...