Newtons Second Law Ch 5

What is the relationship between a change in object’s acceleration and a change in its mass?

• They are directly proportional
• They are inversely proportional
• Acceleration doesn't depend on mass at all.

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NGSS.HS-PS2-1

Accelerations are produced by

• velocities
• accelerations
• forces
• masses

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NGSS.HS-PS2-1

Suppose a force is moving a cart. If suddenly a load is dumped into the cart so that the cart’s mass doubles, what happens to the cart’s acceleration? (a=F/m)

• it quadruples
• it doubles
• it halves
• it quarters

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NGSS.HS-PS2-1

How much force is needed to accelerate a 2 kg physics book to an acceleration of 6 m/s/s?

• 36 N
• 12 N
• 3 N
• 0.33 N

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NGSS.HS-PS2-1

A tennis ball and a solid steel ball the same size are dropped at the same time. In the absence of air resistance, which ball has the greater acceleration?

• The tennis ball
• The steel ball
• Nonsense! They both have the same acceleration

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NGSS.HS-PS2-1

A tennis ball and a solid steel ball the same size are dropped at the same time. Which ball has the greater force acting on it?

• The tennis ball
• The steel ball
• Nonsense! They both have the same acceleration

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NGSS.HS-PS2-1

You pull horizontally on a 50-kg crate with a force of 500 N, and the friction force on the crate is 250 N. The acceleration of the crate is (find net force, use formula)

• zero
• 2 m/s/s
• 4 m/s/s
• 5 m/s/s

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NGSS.HS-PS2-1

Which of the following would exert the most pressure on the ground?

• A women standing in running shoes
• A woman standing in small high heel shoes
• A women on skis

Pressure is defined as

• distance per time.
• force per time.
• time per area.
• force per area.

A jumbo jet cruises at a constant velocity when the force from the engines on the jet is 40000 N. How much air resistance acts on the jet?

• 80000
• 60000
• 40000 N
• 20000

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NGSS.HS-PS2-1