Forces and Newton's Laws

Front

What is the combination of all the forces acting on an object?

Back

net force

Front

Newton's first law of motion states that

Back

an object will remain at rest or keep moving unless acted upon by an external force.

Front

What measures an object's tendency to resist changing its motion?

Back

Inertia

Front

A(n) ______ is a push or a pull that one body exerts on another.

Back

force

Front

What happens to the weight of astronauts when they are in orbit?

Back

It becomes zero.

Front

An example of friction is ___________. Options: a car rolling to a stop at a traffic light, a baseball moving in projectile motion, a tree standing in a field, the free fall of astronauts on the space shuttle

Back

a car rolling to a stop at a traffic light

Front

When force is increased, what happens to acceleration?

Back

It increases.

Front

When a falling object reaches terminal velocity, the force of gravity _______ the force of air resistance.

Back

equal to

Front

Static friction occurs when two objects in contact with each other are ___________ relative to each other.

Back

at rest

Front

What happens to the gravitational force as objects get farther apart?

Back

It decreases.