Physics Final Exam

Ball X has a mass of 5 kg. Ball Y is resting at the bottom of a hill and also has a mass of 5 kg. Ball X rolls down the hill at a speed of 12 m/s and comes to a stop when it collides with Ball Y. What is Ball Y's speed after the collision?

• 12 m/s

• 25 m/s

• 60 m/s

• 5 m/s

Ball X has a mass of 5 kg. It rolls down a hill at a speed of 12 m/s. What is Ball X's momentum as it rolls down the hill?

• 12 kg*m/s

• 25 kg*m/s

• 60 kg*m/s

• 5 kg*m/s

A 75 kg fisherman jumps from a dock with a speed of 1.5 m/s. How much momentum does she have?

• 112.5 kg*m/s

• 22.8 kg*m/s

• 1.25 kg*m/s

• 64.4 kg*m/s

If a 90 kg running back is running with the football at a speed of 8 m/s, how much momentum does he possess?

• 720 kg*m/s

• 98 kg*m/s

• 540 kg*m/s

• 920 kg*m/s

A 90 kg running back is running with the football at a speed of 8 m/s. He is tackled and stopped by an 80 kg defensive back in a head-on collision. How fast was the defensive back moving when they collided?

• 9 m/s

• 8 m/s

• 16 m/s

• 7 m/s

Ted is running the 100 meter dash. If he runs at a speed of 7.5 m/s and his momentum is 525 kg*m/s, what is his mass?

• 70 kg

• 125 kg

• 65 kg

• 90 kg

Ralphie is running the 200 meter dash. If she weighs 50 kg and runs at a speed of 8.5 m/s, how much momentum does she have as she crosses the finish line?

• 425 kg*m/s

• 225 kg*m/s

• 80.4 kg*m/s

• 312.5 kg*m/s

Betsy and Moana are racing each other in the 400 meter dash. Betsy weighs 48 kg and runs with a speed of 6.9 m/s. Moana weighs 63 kg and runs with a speed of 6.5 m/s. Who has greater momentum?

• Moana

• Betsy

• their momentums are equal

Betsy and Moana are racing each other in the 400 meter dash. Betsy weighs 48 kg and runs with a speed of 6.9 m/s. Moana weighs 63 kg and runs with a speed of 6.5 m/s. Who will win the race?

• Moana

• Betsy

• their momentums are equal

A 60 kg sprinter runs a 100 meter dash in 12.0 seconds. How much momentum does she have as she finishes the race?

• 500 kg*m/s

• 646.8 kg*m/s

• 360 kg*m/s

• 92.5 kg*m/s