Momentum Test Review

Kiki accidentally nudges a glass tumbler with her elbow and it falls toward a hard, ceramic tile floor. As a soccer player, Kiki reacts by catching the glass with her foot and lowering it to the floor, preventing the glass from breaking. Her action prevents the breakage because: 

• the change in momentum is smaller when Kiki catches and lowers the glass to the floor
• the impulse is smaller when Kiki catches the glass and lowers it to the floor
• the time interval stopping is greater when Kiki catches the glass with her foot
• a larger force is exerted by Kiki's foot to stop the glass in time

A 0.15-kilogram baseball thrown at a speed of 50 meters per second and a 7.25-kilogram bowling ball rolling at 2 meters per second are both stopped in 0.2 seconds. 

• The baseball is stopped with less force because it has less inertia. 
• The baseball is stopped with less force because it has less momentum. 
• The bowling ball is stopped with less force because it has less momentum.
• The bowling ball is stopped with less force because it has less inertia.

A 2.5 kg ball moving at 5 m/s collides with a 2.5 kg stationary ball in a perfectly elastic collision.  What is the velocity of the second ball after the collision? 

• 5 m/s
• 2.5 m/s
• 10 m/s
• 7.5 m/s

Tags

NGSS.HS-PS2-2

A 9300 kg railroad car traveling at a velocity of 5 m/s strikes a second boxcar that weighs 5000 kg at rest. At what speed will the second boxcar move?

• 18.6 m/s
• 9.3 m/s
• 7.5 m/s
• 1.86 m/s

Tags

NGSS.HS-PS2-2

A 10kg toy truck moves at 5m/s East. It collides head-on with a 5kg toy car moving 10 m/s moving west. What is the total momentum of the system?

• 0 kgm/s
• 30 kgm/s
• 50 kgm/s
• 10 kgm/s

Tags

NGSS.HS-PS2-2

A large box slides across a frictionless surface with a velocity of 12 m/s and a mass of 4 kg,  collides with a smaller box with a mass of 2 kg that is stationary.  The boxes stick together. What is the velocity of the two combined masses after collision?

• 0 m/s
• 4 m/s
• 8 m/s
• 12 m/s

Tags

NGSS.HS-PS2-2

A 65 kg ice skater standing on frictionless ice throws a 0.15 kg snowball horizontally at a speed of 32.0 m/s. At what velocity does the skater move backward?

• - 0.07 m/s
• - 0.30 m/s 
• - 0.15 m/s 
• - 1.20 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

A bowling ball with a mass of 7.0 kg strikes a pin that has a mass of 2.0 kg. The pin flies forward with a velocity of 6.0 m/s, and the ball continues forward at 4.0 m/s. What was the original velocity of the ball?

• 3.3 m/s
• 4.0 m/s
• 5.7 m/s
• 6.6 m/s

Tags

NGSS.HS-PS2-2

A 9300 kg railroad car traveling at a velocity of 10 m/s strikes a second boxcar that weighs 5000 kg at rest. At what speed will the second boxcar move?

• 18.6 m/s
• 14.8 m/s
• 15 m/s
• 12.4 m/s

Both students experience the same ____

• force of impact
• time of impact
• change in momentum
• all of the above

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2