Newton's 1st Law of Motion

While you’re ice-skating with your friends, you push off from one end of the rink and slide forward. Based on Newton’s first law of motion, what is true?

• You will lose your balance and fall over before you reach the middle of the ice rink.

• You will continue to slide across the ice until a force makes you stop or change direction.

• The force of gravity will make you keep your velocity until your friends make you stop.

• The size of your ice skates will determine how quickly or slowly you travel across the ice

Your friend kicks a soccer all, and it stops a few feet from you. What needs to happen to it in order for it to return to your friend?

• Friction has to be applied to the ball.

• Force has to be applied to the ball.

• Speed has to be applied to the ball.

• Inertia has to be applied to the ball.

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NGSS.MS-PS2-2

Newton's 1st Law is know as the law of _____.

• staying in motion

• staying at rest

• balanced forces

• inertia

Inertia is the tendency for objects to resist change in their _____.

• mass

• state of being

• state of motion

• location

What is Newton's 1st Law?

• Every action has an equal but opposite reaction.

• Objects never accelerate, they only move at a constant velocity (or at rest).

• Objects at rest remain at rest, objects in motion remain in motion, at a constant velocity, unless acted upon by an unbalanced force.

• Objects will accelerate, unless acted upon by an unbalanced force.

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NGSS.MS-PS2-2

What happens if you are riding a skateboard and hit something (like a curb) with the front wheels.

• Your body will levitate above the board because you are a Jedi Knight and you used THE FORCE to avoid danger.

• Your body will move backwards while the board moves forward.

• Your body will stick to the skateboard since the curb will stop the board and you at the same time.

• Your body will keep moving forward and fly off your skateboard since the curb only stops the board, not yourself.

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NGSS.MS-PS2-2

All of the following statements are true. Which of them is NOT explained by Newton's first law of motion?

• Dropping a box causes it to accelerate downwards.

• If I'm riding a skateboard, it doesn't spontaneously reverse directions.

• A baseball thrown in space will keep moving in the same direction until it hits something.

• A book lying on a desk doesn't start moving without an external force.

• A ball rolling straight down a tilted plane hill won't veer left or right unless something pushes it.

Two books are laying on a table top. With out picking them up how could you determine which has the greatest inertia?

• It is impossible to tell.

• Look at them... the larger one will have the greatest inertia.

• Give each one a push... the one that doesn't move very far (as compared to the other one) has more mass thus more inertia.

• Neither one has inertia... they are not moving.

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NGSS.MS-PS2-2

Place the following images in order of increasing inertia... 1 has the least and 5 has the most.

• 5

• 
• 1

• 
• 4

• 
• 3

• 
• 2

• 

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NGSS.MS-PS2-2