friction, gravity and Newtons laws

select the three changes in motion that show that an object is accelerating:

• speeding up

• slowing down

• changing direction

• spinning in place

Which one is balanced?

• top
• bottom
• both
• neither

Tags

NGSS.MS-PS2-2

Sally jumps on her trampoline. She exerts a force on the trampoline and the trampoline exerts an equal but opposite force back on Sally. This represents

• Law 1

• Law 3

• Law 2

As mass of two objects increases, gravity...

• Decreases

• Increases

• Stays the same

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NGSS.MS-PS2-4

When a cannon fires a cannonball we observe Newton's third law. Which force is the reaction force?

• The cannon moving forward
• The cannonball moving forward
• The cannon moving backward
• The cannonball moving backward

Tags

NGSS.MS-PS2-1

What is the tendency of an object to resist a change in motion?

• coffee
• motion
• inertia
• gravity

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NGSS.MS-PS2-5

There is a skateboard rolling and then Billy steps on it and it stops. What Law of motion is this?

• 3rd

• 2nd

• 1st

Which law applies?

• 1st
• 2nd
• 3rd

Tags

NGSS.MS-PS2-1

A push or a pull.

• Force

• Friction

• Weight

• Gravity

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

It takes more force to accelerate the iron man on the left than the iron man on the right because the iron man on the left has more mass. This best describes

• Newton's first law, the law of inertia
• Newton's second law, the law of acceleration
• Newton's third law, the law of action reaction 
• The law of universal gravitation

Tags

NGSS.MS-PS2-2