APPLICATION OF NEWTON'S LAWS

Which of Newton's laws states that an object at rest will stay at rest, and an object in motion will stay in motion with the same speed and in the same direction, unless acted upon by an unbalanced force?

According to Newton's Second Law, what happens to the acceleration of an object if the net force acting on it is doubled while its mass remains constant?

A 5 kg box is pushed with a net force of 20 N. What is the acceleration of the box?

When you jump off a small boat onto a dock, the boat moves backward. Which of Newton's laws best explains this?

A student claims that if an object is moving, there must be a force acting on it to keep it moving. Which of Newton's laws directly contradicts this claim?