Semester Exam Review

Match the vocab to the definition

• p & KE are conserved

• Inelastic Collision

• Event in which an object breaks apart

• Explosion

• p is conserved but KE is not.

• Elastic Collision

• Unit for momentum

• kg* m/s

Tags

NGSS.HS-PS2-2

Match the following terms to their correct definitions:

• Product of an object's mass & velocity

• Impulse

• The impulse acting on an object is equal to the object's change in momentum.

• Change in momentum

• The difference between the final and initial momentum of an object.

• Impulse-Momentum Theorem

• The product of force and the time over which that force acts.

• Momentum

Tags

NGSS.HS-PS2-2

A 500-kg motorcycle is traveling at a speed of 20 meters per second. Determine the momentum of the motorcycle. (momentum = mass × velocity)

• 10,000 kg·m/s

• 5,000 kg·m/s

• 25,000 kg·m/s

• 1,000 kg·m/s

Tags

NGSS.HS-PS2-2

A commercial jetliner with a mass of 80,000 kg has a momentum of 640,000 kg·m/s while taxiing on the runway. What is the velocity of the jetliner?

• 8 m/s

• 0.8 m/s

• 80 m/s

• 0.08 m/s

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-1

A wheelbarrow carrying dirt has a momentum of 137 kg·m/s. If the mass of the wheelbarrow is halved (but the velocity remains the same) what will be its new momentum?

• 68.5 kg·m/s

• 274 kg·m/s

• 137 kg·m/s

• 34.25 kg·m/s

Tags

NGSS.HS-PS2-2

A 0.1-kg hockey puck is traveling at -15 m/s when it is struck by a hockey stick causing it to accelerate to a velocity of +10 m/s. Calculate the change in momentum of the hockey puck. (change in momentum = mass × change in velocity)

• 2.5 kg·m/s

• 1.0 kg·m/s

• -2.5 kg·m/s

• 0.5 kg·m/s

Tags

NGSS.HS-PS2-2

What is the impulse experienced when a person applies 25 N of force over 3 seconds to push a lawnmower?

(a)  

A car's airbag applies an impulse of 150 N·s to protect the driver over a time interval of 0.02 seconds. What force does the airbag exert on the driver?

• 7,500 N

• 3,000 N

• 15,000 N

• 300 N

Tags

NGSS.HS-PS2-1

A rocket engine applies a force of 10,000 N, generating an impulse of 500,000 N·s. How many seconds does the engine apply this force? (time = impulse / force)

• 50 seconds

• 5 seconds

• 500 seconds

• 100 seconds

Tags

NGSS.HS-PS2-1

A 2,000-kg SUV is moving at 15 m/s. Determine the force needed to stop the SUV in 6 seconds.

• The force needed to stop the SUV is 5,000 N.

• The force needed to stop the SUV is 2,500 N.

• The force needed to stop the SUV is 10,000 N.

• The force needed to stop the SUV is 1,000 N.

Tags

NGSS.HS-PS2-1