Newton's First Law

forces are those acting on an object that combine and form a net force of zero, therefore they do not change the object's motion.

• balanced

• unbalanced

• magnetic

• frictional

forces are those acting on an object that combine and form a net force that is not zero, therefore the object's motion changes.

• unbalanced

• balanced

• electrical

• magnetic

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What is the net force?

• 5 N

• 45 N to the left

• 5 N to the right

• 45 N to the right

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In order to make an object accelerate faster, would you need to apply more or less force?

• more

• less

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Which of the following best describes Newton's First Law of Motion?

• An object in motion stays in motion unless acted upon by an external force.

• For every action, there is an equal and opposite reaction.

• Force equals mass times acceleration.

• Energy cannot be created or destroyed.

After a ball is kicked and put into motion, what will happen to the ball?

• It will come to a stop immediately.

• It will continue to move until acted upon by another force.

• It will change direction on its own.

• It will move faster and faster indefinitely.

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Why will an object on top of a car keep moving when the car stops?

• Due to inertia

• Because of friction

• Because of gravity

• Due to air resistance

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What would happen if there were no unbalanced forces to act on a skier at the top of the mountain?

• The skier would remain stationary.

• The skier would start moving downhill.

• The skier would move uphill.

• The skier would float in the air.

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If a ball is thrown out into space, how would you predict it to move?

• It will move in a straight line indefinitely.

• It will stop after a certain distance.

• It will return to the point of origin.

• It will move in a circular path.

What do you think the term “equilibrium” means?

• A state of rest or balance due to the equal action of opposing forces

• A condition where all variables are changing

• A situation where there is constant movement

• A phase where only one force is acting