Impulse Quiz

Tiffany kicks a soccer ball (mass=0.4 kg) with a force of 1200 N for 0.006s. What is the ball’s final velocity?

• 2.8 m/s

• 4.2 m/s

• 24 m/s

• 18 m/s

A 15 kg Trumpeter Swan is subject to the force of gravity for 4 s. What is the impulse?

• 60 N-s

• 75 N-s

• 600 N-s

• 300 N-s

A 0.15–kg baseball is struck by a bat that produces a force of 250 N and gives the ball a

velocity of 50 m/s. For how long was the club in contact with the ball?

• 6 s

• 7.5 s

• .03 s

• .045 s

A force of 160 N acts on a 8–kg bowling ball for 0.40 s. What is the bowling ball’s change in momentum?

• 6.4 N-s

• 64 N-s

• 512 N-s

• 3.2 N-s

Serena Williams serves a 0.55 kg tennis ball at her record breaking velocity of 57 m/s. Naomi Osaka hits it so that it is now going 60 m/s in the other direction. What impulse did the ball exert on Naomi Osaka racket's?

• 63.35 N-s

• 33 N-s

• 31.35 N-s

• 1.65 N-s

What braking force is supplied to a 4000 kg car traveling with at 24 m/s that comes to a stop in 18 s?

• 72000 N

• 8000 N

• 6000 N

• 96000 N

A .08 kg model rocket's engine produces 12 N of thrust. If the rocket starts from rest, how fast will it be moving after .5 s?

• 60 m/s

• 75 m/s

• 80 m/s

• 96 m/s

Your 45 kg suitcase is rolling away from you with a speed of 2 m/s. You apply an opposing force of 3.0 N until it stops. How long was the force applied?

• 90 s

• 270 s

• 30 s

• 45 s

You and your friend are playing with bumper cars and crash for 6 seconds. Before the collision you and bumper car (180 kg) were moving at 12m/s. After the collision you move at 8m/s in the opposite direction. What force did your bumper car feel?

• 1296 N

• 1080 N

• 576 N

• 600 N

Which has the greater change in momentum, a .12 kg clay ball that strikes a wall at 3 m/s and sticks or a .12 kg superball that strikes a wall at 3 m/s and bounces away from the wall at 0.9 m/s?

• Clay ball has greater change in momentum

• Super ball has greater change in momentum

• They have the same change in momentum

• Momentum is not conserved so we do not know