Momentum Physics

The change in momentum for the plate in this situation is fixed—1.125 kg m/s. The force of impact is very large, thereby breaking the plate. If the time were larger than 0.00024 s, would the force of impact be larger or smaller than your answer to question 11?

• Larger

• Smaller

• The same

• Cannot be determined

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

Consider again the plate in questions 10 and 11. If the plate hits a pillow instead of the floor it might not break. This question will examine the physics that explains why the plate may not break. If the plate falls onto a pillow instead of the floor, will the time of impact be greater or smaller?

• Greater

• Smaller

• The same

• It depends on the height

Tags

NGSS.HS-PS2-3

The time of impact when the plate hits the pillow is 0.0085 s. Now calculate the force of impact. (The change in momentum is the same as it was in question 10. Only the time has changed; the time is no longer 0.00024 s as it was in question 11.) What is the force of impact?

• 100 N

• 200 N

• 300 N

• 400 N

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

When comparing the momentum of two moving objects, which of the following is correct?

• The object with the higher velocity will have less momentum if the masses are equal.

• The more massive object will have less momentum if its velocity is greater.

• The less massive object will have less momentum if the velocities are the same

• The more massive object will have less momentum if the velocities are the same

Tags

NGSS.HS-PS2-2

The impulse experienced by a body is equivalent to the body’s change in

• velocity

• kinetic energy

• momentum

• force

Tags

NGSS.HS-PS2-2

Two skaters stand facing each other. One skater’s mass is 60 kg, and the other’s mass is 72 kg. If the skaters push away from each other without spinning,

• the lighter skater has less momentum

• their momenta are equal but opposite

• their total momentum doubles

• their total momentum decreases

Tags

NGSS.HS-PS2-2

In a two-body collision,

• momentum is always conserved

• kinetic energy is always conserved

• neither momentum nor kinetic energy is conserved

• both momentum and kinetic energy are always conserved

Tags

NGSS.HS-PS2-2

The law of conservation of momentum states that

• the total initial momentum of all objects interacting with one another usually equals the total final momentum

• the total initial momentum of all objects interacting with one another does not equal the total final momentum

• the total momentum of all objects interacting with one another is zero

• the total momentum of all objects interacting with one another remains constant regardless of the nature of the forces between the objects

Tags

NGSS.HS-PS2-2

Which of the following has the greatest momentum?

• a tortoise with a mass of 275 kg moving at a velocity of 0.55 m/s

• a hare with a mass of 2.7 kg moving at a velocity of 7.5 m/s

• a turtle with a mass of 91 kg moving at a velocity of 1.4 m/s

• a roadrunner with a mass of 1.8 kg moving at a velocity of 6.7 m/s

Tags

NGSS.HS-PS2-2

A 0.2 kg baseball is pitched with a velocity of 40 m/s and is then batted to the pitcher with a velocity of 60 m/s. What is the magnitude of change in the ball’s momentum?

• 2 kg·m/s

• 4 kg·m/s

• 8 kg·m/s

• 20 kg·m/s

Tags

NGSS.HS-PS2-2