Physics, Momentum and Collisions Review

Which of the following correctly defines momentum?

• mass in motion
• how difficult it is to stop a body
• product of a body's mass and velocity
• all of these are correct

Tags

NGSS.HS-PS2-2

What are the units of momentum?

• kg
• m/s
• kg⋅m/s
• N

Tags

NGSS.HS-PS2-2

What is the momentum of a charging rhino?

• 2 × 10² kg⋅m/s
• 3 × 10² kg⋅m/s
• 2 × 10⁴ kg⋅m/s
• 3 × 10⁴ kg⋅m/s

Tags

NGSS.HS-PS2-2

Which object has the greatest momentum?

• soccer ball
• baseball
• bowling ball
• cannot be determined

Tags

NGSS.HS-PS2-2

If all of these objects move at the same speed, which one would have the greatest momentum?

• soccer ball
• baseball
• bowling ball
• cannot be determined

Tags

NGSS.HS-PS2-2

The law of conservation of momentum states that, 

• p before is less than p after
• p before is the same as p after
• p before is more than p after

Tags

NGSS.HS-PS2-2

A 0.250 kg cart moving at 0.400 m/s has how much momentum?

• 0.1 kg-m/s
• 1 kg-m/s
• 10 kg-m/s
• 100 kg-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 2.5 kg ball moving at 4.2 m/s collides with a 2.5 kg stationary ball. If the first ball is at rest after the collision, what is the velocity of the second ball? 

• 2.1 m/s
• 2.5 m/s
• 4.2 m/s
• 8.4 m/s

Tags

NGSS.HS-PS2-2

A 120 kg lineman moving at -2 m/s tackles an 80 kg fullback moving at +8 m/s. Both players are intertwined as they fall to the ground.  If the fullback's velocity after they collide is +2 m/s, what is the lineman's velocity?

• 2 m/s
• 8.7 m/s
• 4.7 m/s
• 6 m/s

Tags

NGSS.HS-PS2-2