A student (having a mass of 49 kg) falls freely from rest and strikes the ground. He comes to rest in a time of 0.387 s during the collision on the ground. The average force exerted on him by the ground is +31243 N, where the upward direction is taken to be the positive direction. From what height did the student fall? Assume that the only force acting on the student during the collision is due to the ground for this problem.

A student (having a mass of 49 kg) falls freely from rest and strikes the ground. He comes to rest in a time of 0.387 s during the collision on the ground. The average force exerted on him by the ground is +31243 N, where the upward direction is taken to be the positive direction. From what height did the student fall? Assume that the only force acting on the student during the collision is due to the ground for this problem.

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter8: Momentum And Collisions

Section: Chapter Questions

Problem 10CQ

See similar textbooks

Similar questions

The force shown in the force vs. time diagram in the figure below acts on a 1.0-kg object. A coordinate plane has a horizontal axis labeled t (s) and a vertical axis labeled Fx (N). A straight line is drawn from (0,2) to (3,2), then from (3,2) to (5,0). A vertical dashed line is drawn from (3,0) to (3,2). (a) Find the impulse of the force.(b) Find the final velocity of the object if it is initially at rest.(c) Find the final velocity of the object if it is initially moving along the x-axis with a velocity of −1.7 m/s
In the figure, block 1 of mass m1 slides from rest along a frictionless ramp from height h and then collides with stationary block 2, which has mass m2 = 3m1. After the collision, block 2 slides into a region where the coefficient of kinetic friction is μk and comes to a stop in distance d within that region. What is the value of distance d if the collision is (a) elastic and (b) completely inelastic? Express your answer in terms of the variables given and g.
A girl weighing 540 N jumps from a tree, and her center of mass falls a vertical distance of 1.80 m. Find the impulse necessary to bring her to rest.Over what time interval must the deceleration last in order that the average force does not exceed 190 N? please solve
********PLEASE ONLY ANSWER PART D AND E******* Starting with an initial speed of 5.38 m/s at a height of 0.380 m, a 1.87-kg ball swings downward and strikes a 5.13-kg ball that is at rest, as the drawing shows. (a) Using the principle of conservation of mechanical energy, find the speed of the 1.87-kg ball just before impact. This value is 6.03 m/s (b) Assuming that the collision is elastic, find the velocity (magnitude and direction) of the 1.87-kg ball just after the collision. This value is -2.01 m/s (c) Assuming that the collision is elastic, find the velocity (magnitude and direction) of the 5.13-kg ball just after the collision. This value is 3.22 m/s (d) How high does the 1.87-kg ball swing after the collision, ignoring air resistance? (e) How high does the 5.13-kg ball swing after the collision, ignoring air resistance? I just need d and e answered please! Thank you.
Starting from Newton’s second law of motion, prove that impulse imparted on an object is equal to the change in momentum its momentum. Two masses m1 and m2 with a separation distance of d, attract each with a force F. What is the relationship between the F, m1, m2, and d? By what factor will the force of attraction change if the distance is quadrupled? A 400 kg object moving at a speed of 5 m/s to the right collides with a 600 moving at 2 m/s to the left. After the collision, the 600 kg object moves to the right at a speed of 3 m/s. Determine, the velocity of the 400 kg object after the collision
Two train cars on a frictionless track have a completely inelastic collision in which they "couple" together. The car on the left has mass 16.1 tons and velocity 16.1 m/s to the right; the other train has mass 10.8 tons and velocity 13.1 m/s to the left. After the collision, what is the velocity of the pair fo cars? Your answer should be in tons times m/s, but you don't need to write the units, just the number. "To the right" is taken as positive, so make sure you have the sign right. (If your answer is positive, you don't need to write a "+" sign.)
Two cars, both of mass m, collide and stick together. Prior to the collision, one car had been traveling north at speed 2v, while the second was travelling at speed v at an angle theta south of east (as indicated in the figure). After the collision, the two car system travels at a speed vfinal at an angle phi east of north. Express your answers in terms of known quantities. Find the magnitude of the speed vfinal in terms of v and theta.
An astronaut floating at rest in space has run out of fuel in her jetpack. She realizes that throwing tools from her toolkit in the opposite direction will help propel her back toward the space station. If the astronaut has a mass of 85 kg and she throws a hammer of mass 4.5 kg at a speed of 4 m/s, what will be the approximate resultant velocity that carries her back to the space station?
Keith Lee, who is billed at 154 kg, ejects Adam Cole, billed at 95 kg, from frame. Assuming Cole comes to a complete stop before being yeeted, what is the net force he feels if he travels 2 m in 0.65 s?
As part of a safety investigation, two 1400 kg cars traveling at 20 m/s are crashed into different barriers. Find the average forces exerted on (a) the car that hits a line of water barrels and takes 1.5 s to stop, and (b) the car that hits a concrete barrier and takes 0.10 s to stop.
Block 1, of mass m1m1m_1 = 6.30 kgkg , moves along a frictionless air track with speed v1v1v_1 = 17.0 m/sm/s . It collides with block 2, of mass m2m2m_2 = 37.0 kgkg , which was initially at rest. The blocks stick together after the collision. Find the magnitude pipip_i of the total initial momentum of the two-block system. Express your answer numerically. Find vfvfv_f, the magnitude of the final velocity of the two-block system. Express your answer numerically. What is the change ΔK=Kfinal−KinitialΔK=Kfinal−Kinitial in the two-block system's kinetic energy due to the collision? Express your answer numerically in joules.
Please don't provide handwritten solution .... At time t1 = 16 s, a car with mass 1300 kg is located at <117, 0, 28> m and has momentum <6000, 0, -3600> kg · m/s. The car's momentum is not changing.At time t2 = 21 s, what is the position of the car?