Newton's 1st Law only

Using Newton's Laws of Motion, which of the following would happen if a person sat on a chair and the chair did not exert an equal force back?

• The chair would stay the same.
• The chair would become wider.
• The person would fall to the floor.
• The person would not be able to get out of the chair.

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NGSS.MS-PS2-2

NGSS.MS-PS2-5

The crash test dummy in the picture is not wearing a seat belt. When the car crashes into the truck, the dummy will fly through the windshield. Why does this happen?

• The dummy does not have a restraint to stop its motion, and as the car stops, the dummy will continue in its uniform line of motion.
• The dummy does not have a restraint to stop its motion, so it will do the same motion as the car. When the car stops, the dummy will also stop.
• The dummy does not need a restraint because it is inside the car. The dummy has a mass that will keep it in its seat upon the collision.
• Friction keeps the dummy in its seat.

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NGSS.MS-PS2-2

NGSS.MS-PS2-1

A student flicked an index card with their fingertip, and the coin fell straight down into a plastic cup. Based on Newton's 1st Law, which is statement below best explains why the coin fell into the cup instead of remaining on the index card?

• Because the action of flicking the cards creates a reaction of the coin falling.
• Because the mass of the coin creates a large acceleration of the card.
• Because the action of flicking the card creates a reaction of the coin falling.
• Because the coin is at rest and will stay at rest, unless acted on by an unbalanced force.

What is another name for Newton's First Law?

• Law of Movement
• Law of Inertia
• Law of Motion
• Law of Rest

What is inertia?

• The resistance to change in motion.
• The inability to move
• The force that slows something down
• All of the options are correct

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NGSS.MS-PS2-2

An object with greater mass has greater inertia.

• True
• False

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NGSS.MS-PS2-2

Balanced forces are needed to change an objects motion.

• True
• False

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NGSS.MS-PS2-2

Will it take more force to stop a bowling ball or a basketball?

• A basketball because it is going faster and is easier to speed up or slow down.
• A bowling ball because it resists motion due to its mass.
• A basketball because it is heavier than a bowling ball.
• They will both require the same amount of force to be stopped.

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NGSS.MS-PS2-2

Motion means:

• To travel at a constant speed and in a straight line
• There are unbalanced forces causing something to move
• That there is an increase in acceleration.
• None of the above

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NGSS.MS-PS2-2

When forces are considered unbalanced, it means that the net forces are:

• equal
• the same
• different
• not equal to zero

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NGSS.MS-PS2-2