# impulse and momentum

QUESTION#1

A 1.0-kg ball has a velocity of 12 m/s downward just before it strikes the ground and bounces up with a velocity of 12m/s upward.

What is the change in momentum of the ball?

Question#2

A 0.1-kg steel ball is dropped straight down onto a hard horizontal floor and bounces straight up. Its speed just before "and just after " with the floor is 10m/s.

Determine the magnitude of impulse delivered to the floor by the steel ball.

Question #3

A 0.50kg-bomb is sliding along an icy pond (frictionless surface) with a velocity of 2.0 m/s to the west. The bomb explodes into two pieces. After the explosion, a 0.20-kg piece moves south at 4 m/s.

What are the components of the velocity of the 0.30-kg piece?

Question #4

Two cars of equal mass collide on a horizontal frictionless surface. Before the collision, Car A is at rest while Car B has a constant velocity of 12m/s. After the collision, the two bodies are stuck together

What is the speed of the composite body (A+B) after the collision?

Question #5

The head of a hammer (m=1.5kg) moving at 4.5 m/s strikes a nail and bounces back with the same speed after an elastic collision lasting 0.075 s.

What is the magnitude of the average force the hammer exerts on the nail?

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#### Solution Summary

The impulse and momentum related questions are investigated. Also, it explains how to solve collision by applying conservation of momentum. The solution is detailed and well presented.

Impulse Momentum, Conservation of Linear Momentum, & Collisions

See attached file.

The problems came out from Physics 7th edition by Cutnell and Johnson, chapter 7. The sections include 1) the impulse-- momentum theorem 2) the principle of conservation of linear momentum 3) collisions in one dimension 4) collisions in two dimensions and 5) center of mass.

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