PHYSICS: Momentum, KE, Impulse and Collisions

A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?

• 25 m/s
• 375 m/s
• 25 kg m/s
• 375 kg m/s

Tags

NGSS.HS-PS2-2

The units for Impulse are

• N/s
• N.s
• N
• m/s

A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s.
Calculate the impulse on the ball.

• 1 N.s
• 6 N.s
• 66 N.s 
• None of these

Tags

NGSS.HS-PS2-1

The purpose of crumble zones on a car is to

• decrease time of impact.
• increase force of impact.
• increase the time of impact.
• decrease the impulse during impact.

Tags

NGSS.HS-PS2-3

The difference between a car hitting a wall vs. a car hitting a hay stack is

• the Impulse on the car hitting the wall is greater
• the change in momentum of the car hitting the wall is greater
• the force on the car hitting the hay stack is greater
• the collision time of the car hitting the hay stack is greater

Tags

NGSS.HS-PS2-2

A 5 N force is applied to a 3 kg ball to change its velocity from +9 m/s to +3 m/s.  The impulse on the ball is  ______ N s.

• -2.5
  .
  .
• -10
• -18
• -45

Tags

NGSS.HS-PS2-1

A constant force of 4.5 N acts on a 7.2-kg object for 10.0 s. What is the     change in the object's velocity? 

• 6.3 m/s
• 3.2 m/s
• 1.2 m/s 
• 4.33 m/s

Tags

NGSS.HS-PS2-1

The momentum of an object depends upon the object's ___________&_____________.

• size and shape

• mass and speed

• mass and veloctiy

• mass and energy

Tags

NGSS.HS-PS2-2

A(n) _________________ causes and is equal to a change in momentum

• impulse
• force
• joule
• watt

Tags

NGSS.HS-PS2-2

While playing pool, the white cue ball strikes the 8 ball. Before the collision, the cue ball's velocity was 10 m/s and the 8 ball was at rest. If both ball's have a mass of 0.15 kg and the cue ball's velocity after the collision is 2 m/s, what is the 8 ball's velocity?

• 2 m/s
• 8 m/s
• -2 m/s
• 1.5 m/s

Tags

NGSS.HS-PS2-2