Question

An astronaut throws a rock. the rock travels through outer space at a constant velocity. which statement applies to the motion of this rock?

A- an unbalanced force is acting on the rock, causing it to accelerate.
B-the rock will undergo constant acceleration until a force acts on it.
C- The rock will continue on its current path until an unbalanced force acts on it.
D- The force that makes the rock move through space is equal to its mass divided by its velocity

Answer 1

This is an example of Newton's first law of motion:

An object at rest will remain at rest unless an unbalanced force acts upon it. Similarly, a moving object will remain moving in a straight line at constant velocity unless an unbalanced force acts upon it.

The answer is C.

Answer 2

B. a force equal to zero