Force and Motion

John pushes a chair up a ramp into a moving truck. Sally lifts the chair straight up to the moving truck. Sally says that he is doing more work because lifting the box takes more energy. Is Sally correct?

• Yes, using more force to move an object does more work.

• No, John is doing more work because he has to travel farther to move the box up the ramp.

• No, they are doing the same amount of work because their force multiplied by their distance is the same.

Newton's third law states for every action their is an equal or opposite reaction. Which is the best example

• The air rushing out of a balloon, causing it to move across the room. 

• Flying forward in you seat when the brakes a slammed on.

• A weight lifter dropping the bar.

• A softball flying on the air

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NGSS.MS-PS2-1

When a car suddenly stops at a red light, a pizza lying in the passengers seat flies in to the windshield. Why does the pizza fly forward?

• The pizza loses its backward force

• The pizza's inertia causes it to continue moving. 

• The friction of braking transfers energy to the pizza. 

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the net force shown in the diagram?

• 50N right

• 950N

• 50N left

• 150N left

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

The more massive an object, the (a)   affect a certain force will have on the object.

• less

• more

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NGSS.MS-PS2-2

Newton's 2nd law states---

• For action there is an equal or opposite reaction

• F=M x A

• Law of inertia 

A train traveling 60 mph slows down as it comes to a stop. This is an example of _____________

• Acceleration

• Distance

• Speed

• Velocity

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NGSS.MS-PS3-5

A fan is turned off in the living room. The fan slows down and comes to a rest as the forces become _______

• Frictional

• Balanced

• Unbalanced 

• Restricted

Looking at the roller coaster, were does the cart have the most potential energy?

• A

• B

• C

• D

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NGSS.MS-PS3-2

How much force is needed to accelerate a 5 kg marble at a rate of 2.5 m/s?

• 12.5

• 10

• 2

• 12

Tags

NGSS.MS-PS2-2