Impulse

What is the unit of impulse?

• N/s

• Kg.m/s

• N.s

• Kg.m/s and N.s

• None of the above

A baseball bat applies a force of 500 N to a ball for 0.1s. What was the impulse on the ball?

• 5 N . s

• 500 N .s

• 500 N/s

• 50 N.s

The impulse is _____the change in momentum

• Greater than

• Equal to

• Less than

• Always double

Tags

NGSS.HS-PS2-2

A car crashes into a wall with an impulse of 40,000 kg.m/s. The collision took 2 seconds . How much force did the wall exert?

• 60,000 N

• 40,000 N

• 20,000 N

• 80,000 N

Tags

NGSS.HS-PS2-1

If you push an object with a force of 10 N for 5 seconds , you will change it’s momentum by:

• 2 N s

• 50 n s

• 2 N/s

• 50 N/s

Tags

NGSS.HS-PS2-2

Which of the following does the impulse-momentum equation implies? Check all that apply

• The equation evaluates the change in momentum

• It states that the change in momentum = impulse

• In order to get the largest possible change in momentum, we use the equation to find the smallest impulse possible.

• All of the above

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

• 33.3 N⋅s

A 5 N force is applied to a 3 kg ball to slow it down from 9 m/s to 3 m/s. What is the impulse on the ball?

• -2.5 N⋅s

• -10 N⋅s

• -18 N⋅s

• -45 N⋅s

Tags

NGSS.HS-PS2-1

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

Cart A is pulled with a 2 Newton force for 2 seconds, and Cart B is pulled with a 1 Newton force for 3 seconds.  Which cart experiences the greatest impulse?

• Cart B
• Cart A
• they are the same

Tags

NGSS.HS-PS2-1