Conservation of Momentum in One Dimension

A 0.111 kg hockey puck moving at 55 m/s is caught by a 80 kg goalie at rest. With what speed does the goalie slide on the (frictionless) ice?

0.076 m/s

The linear momentum of a truck of mass 5000 kg that is moving at a velocity of +30 m/s is ___ kg ⋅ m/s

150000

A 0.050 kg bullet strikes a 5.0 kg wooden block with a velocity of 909 m/s and embeds itself in the block which then flies off its stand. What was the final velocity of the bullet?

9 m/s

A 0.050 kg bullet strikes a 5.0 kg wooden block and embeds itself in the block. The block (with the bullet embedded) flies off its stand at 9.0 m/s. What was the original velocity of the bullet?

909 m/s

Two stationary carts are tied together by a thread with a compressed spring held between them. When the thread is cut, the two carts move apart. After the spring is released, one cart m= 3.00 kg travels east with a velocity of 0.82 m/s. What is the magnitude of the velocity of the second cart (m = 1.70 kg) after the spring is released?

-1.45 m/s

A 0.50 kg ball traveling at 6.0 m/s due east collides head on with a 1.00 kg ball traveling in the opposite direction at -12.0 m/s. After the collision, the 0.50 kg ball moves away at -14 m/s. What is the velocity of the other ball after the collision?

-2 m/s

A 0.111 kg moving hockey puck is caught by a 80 kg goalie who then slides on the frictionless ice at 0.076 m/s. What was the initial velocity of the hockey puck?

55 m/s

A rifle recoils from firing a bullet. The speed of the rifle's recoil is small compared to the speed of the bullet because the momentum of the rifle is unchanged.

FALSE

Due to less impulse in stopping, a falling glass may not break if it falls on a carpeted floor.

FALSE

A butterfly is hit by a garbage truck on the highway. The force of the impact is greater on the butterfly.

TRUE

A butterfly is hit by a garbage truck on the highway. The force of the impact is the same for both.

TRUE

A rifle recoils from firing a bullet. The speed of the rifle's recoil is small compared to the speed of the bullet because _____.

the rifle has a great deal more mass than the bullet