Physics Quiz

A force is described as ______________.

• a twist

• a push only

• a pull only

• none of the above

• a push or pull

What unit do scientists use to measure force?

• Grams

• Newton

• Kilograms

• Meters

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When you slide a box across the floor, what force must your push be stronger than?

• Air resistance

• Support force

• Friction

• Gravity

The person and car will stop together.

• The person will stop faster than the car because they have less mass.

• The car will stop and the person will speed up.

• The person and car will stop together.

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Two astronauts are floating in space far away from any planets or stars. What is the direction of the gravitational force that they experience, if any?

• They experience no gravitational force.

• They experience a gravitational force towards the nearest star.

• They experience a gravitational force towards each other.

• They experience a gravitational force towards the Earth.

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Which vehicle must begin applying their brakes first when approaching a stoplight?

• The truck, because it is loaded

• The car, because it is lighter

• Both vehicles at the same time

• Neither, they can stop without braking

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Which vehicle would stop first if both hit the brakes at the same time?

• The truck, because it has more mass.

• The car, because it is traveling faster.

• Both, because they start together and would hit the brakes at the same time.

• The truck, because it is longer.

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You might have noticed that a feather falls slowly toward the ground, while a ball falls rapidly. Which statement correctly explains the motion of these objects?

• The ball does not experience fluid friction as it falls.

• The feather experiences more fluid friction than the ball.

• The acceleration of the ball and feather are the same.

• Gravity is the only force acting on the feather and the ball.

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Teresa did a trick in where she placed dishes on a tablecloth that was draped over a table. She pulled quickly on the tablecloth and it came off the table, leaving the dishes behind on the table. The inertia of the dishes kept them on the table, according to which law?

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• Law of Universal Gravitation

An astronaut in space might feel weightless, but there still is a gravitational attraction between the astronaut and Earth. Which two factors affect this gravitational attraction?

• the rotation of Earth and the moon

• the masses of Earth and the astronaut and the distance between them

• the force between Earth and the astronaut

• the weight of Earth and the astronaut

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