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Chapter 11: Q. 13 (page 287)

A 250gball collides with a wall. FIGURE EX11.13 shows the ball鈥檚 velocity and the force exerted on the ball by the wall. What is vfx, the ball鈥檚 rebound velocity?

Short Answer

Expert verified

The rebound velocity of ball6m/s.

Step by step solution

01

Given information  

We need to find the rebound velocity of ball.

02

Simplify 

By using the impulse-momentum theorem, we can assume collisions are elastic. Initial velocitiy vix=-10m/sshowm in figure left and in the right figure Jx=(500N脳0.008s)=4Ns

So we have

pfx=pix+Jxmvfx=mvix+Jx/:mvfx=vix+Jxm=-10m/s+4Ns0.250kg=6m/s.

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Most popular questions from this chapter

A package of mass m is released from rest at a warehouse loading dock and slides down the 3.0m-high, frictionless chute of FIGURE EX11.25 to a waiting truck. Unfortunately, the truck driver went on a break without having removed the previous package, of mass 2m, from the bottom of the chute.

a. Suppose the packages stick together. What is their common speed after the collision?

b. Suppose the collision between the packages is perfectly elastic. To what height does the package of mass m rebound?

A 2kgobject is moving to the right with a speed of 1m/s when it experiences an impulse of 4Ns. What are the object鈥檚 speed and direction after the impulse?

A sled slides along a horizontal surface on which the coefficient of kinetic friction is 2.5. Its velocity at point Ais 8.0m/sand at point Bis 5.0m/s. Use the momentum principle to find how long the sled takes to travel from AtoB.


A 0.2kgplastic cart and a 20kglead cart can both roll without friction on a horizontal surface. Equal forces are used to push both carts forward for a distance of 1m, starting from rest. After traveling 1m, is the momentum of the plastic cart greater than, less than, or equal to the momentum of the lead cart? Explain.

A 200gball is dropped from a height of 2.0m, bounces on a hard floor, and rebounds to a height of 1.5m. FIGURE P11.41 shows the impulse received from the floor. What maximum force does the floor exert on the ball?
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