Motion and forces quiz

An object at rest remains at rest, or if in motion, remains in motion at a constant velocity unless acted on by a net external force. Which law is this?

• Newton's first law

• Newton's second law

• Newton's third law

• None of the above

On Earth, nothing moves forever because of which factors?

• gravity

• friction

• air resistance

• all the above

Force = mass x acceleration is which law?

• Newton's first law

• Newton's second law

• Newton's third law

• none of the above

For every action, there is an equal and opposite reaction is which law?

• Newton's first law

• Newton's second law

• Newton's third law

• all the above

A __________ is how fast and in what direction a point is moving.

• vector

• speed

• mass

• inertia

The rate at which velocity changes over time, in terms of both speed and direction.

• acceleration

• mass

• inertia

• friction

a force that resists the sliding or rolling of one solid object over another.

• acceleration

• inertia

• friction

• velocity

If a ball with a mass of 3 kg in space is pushed with a force of 120 Newtons for 0.1 seconds, what speed will it have once it finishes accelerating?

• 2 m/s

• 4 m/s

• 40 m/s

• 20 m/s

The equation for acceleration

• change in speed / change in time

• change in time / change in speed

• change in speed / change in direction

• distance / time

A car travels 300 km in 6 hours. What is the average speed in km/h?

• 1800 km/h

• 50 km/h

• 60 km/h

• 18 km/h