Star Life Cycle, Newton's Laws and Solar System Quiz

Newton’s 1st Law states

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

• Objects at rest want to move.

• Objects at rest stay at rest and objects in motion will stay in motion unless acted upon by an external force.

• Objects in motion need a force for them to keep moving.

A moving object has more inertia if it is in motion.

• True

• False

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Inertia is

• An object’s ability to resist a change in motion.

• Measured by the Mass of the object

• Both a and b are correct.

Objects in motion, without an external force acting on them, will continue to move

• In a circle but with a constant speed.

• In a straight line at a constant speed.

• In a straight line but slowing down.

• Because of magic.

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Mr. Gravy Tee spends most Sunday afternoons at rest on the sofa and eating a lot of food. Which of the claims below is best for what happens to Mr. Gravy’s inertia?

• There is no effect on his inertia because he is not moving.

• His inertia increases because of his mass increase.

• His inertia decreases because he is harder to move.

You hit a ball in outer space. The ball will keep going in a straight line forever until a force acts on it. Which of these is the best piece of evidence to support that the ball will move on forever?

• You threw the ball.

• There is no gravity in space.

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

It is a good idea to run in a zig-zag pattern if you are being chased by a moose because_____

• The moose has more inertia and can’t turn as easily.

• The moose has hooves and slips on the ground.

• The moose doesn’t follow Newton’s First law because he does not know it.

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An elevator is being lifted up an elevator shaft at a constant speed by a steel cable. All frictional forces are negligible. In this situation, forces on the elevator are such that:

• The upward force by the cable is greater than the downward force of gravity

• The upward force by the cable is equal to the downward force of gravity

• The upward force by the cable is smaller than the downward force of gravity

• The upward force by the cable is greater than the sum of the downward force of gravity and a downward force due to the air

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The acceleration of an object is proportional to

• the net force acting on it

• its position

• its velocity

• its mass

• its displacement

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The acceleration of an object is inversely proportional to

• the net force acting on it

• its position

• its velocity

• its mass

• its displacement

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