Unit 3.4 - Momentum and Impulse

An egg landing on a soft surface will remain intact. The surface increases the _____ and decreases the _____ during the impact

• impulse, time

• impulse, force

• force, time

• time, force

Tags

NGSS.HS-PS2-3

The air bag on a car reduces the force experienced by the driver, by extending the time of impact.

• True

• False

Tags

NGSS.HS-PS2-3

An object has a change in velocity of 20 m/s with an impulse of 15 Ns. What is the mass of the object?

• 30 kg

• 1.25 kg

• .75 kg

• 25

Tags

NGSS.HS-PS2-1

A freight car of mass 20,000kg moves along a track at 15 m/s. What is the momentum of the car?

• 30,000 kg*m/s

• 3,000 kg*m/s

• 300,000 kg*m/s

• 3,000,000 kg*m/s

Tags

NGSS.HS-PS2-2

What is the magnitude of the change in velocity for the ball

• 28
• 2
• 58
• 0

Tags

NGSS.HS-PS2-2

How long was a 40 N object moving form, if it had a momentum of 250 kg m/s?

• 2.5 sec

• 4 sec

• 7 sec

• 6.25 sec

Tags

NGSS.HS-PS2-2

When a cannon fires a cannon ball, it recoils backwards. This occurs because of...

• Energy in the system is conserved

• Energy in the system is increased

• Momentum in the system is conserved

• Energy in the system is not conserved

Tags

NGSS.HS-PS2-2

When the speed of an object is doubled, its momentum

• remains unchanged in accord with the conservation of momentum.
• doubles
• quadruples
• decreases

Tags

NGSS.HS-PS2-2

A truck with a mass of 3500 kg traveling at a velocity of 15 m/s collides head on with a car that has a mass of 1000 kg with a velocity of 10 m/s. The collision is perfectly inelastic. What velocity would they have after the collision?

• 13.9 m/s in the direction the car was going

• 17.9 m/s in the direction the truck was going

• 13.9 m/s in the direction the truck was going

• 0 m/s

• There is not enough information to know.

Tags

NGSS.HS-PS2-2

• Impulse = change in momentum

• Force = impulse

• Momentum is conserved

• Energy is conserved

Tags

NGSS.HS-PS2-2