Duplicate of Duplicate of Newton's Laws of Motion

If you go to the moon, your mass is 

A 4 kg car accelerates at a rate of 6 m/s². How much force is the car's engine producing?

The Law of Inertia is:

F=ma is

Which object experiences a greater force when a kid on a bike hits a moving car?

A hammer applies a force to a nail. What is the reaction force in this scenario?

A book weighs 4 N. When it is at rest in your hand, the net force on the book is:

The law of action and reaction is:

An object has twice as much mass as another object. The 1st object also has twice as much:

In outer space it would be easier to push a boulder than it is on earth.

A person weighs 600 N on the earth, what is their mass on the earth?