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5/40 MCQs for:
Dynamics: Newton’s Laws of Motion
A rocket moves through empty space in a straight line with constant speed. It is far from the gravitational effect of any star or planet. Under these conditions, the force that must be applied to the rocket in order to sustain its motion is:
Action-reaction forces are:

A person on a scale rides in an elevator. If the mass of the person is 60.0 kg and the elevator accelerates upward with an acceleration of 4.90 m/s², what is the reading on the scale?

An object slides on a level surface in the +x direction. It slows and comes to a stop with a constant acceleration of -2.45 m/s². What is the coefficient of kinetic friction between the object and the floor?

In the absence of an external force, a moving object will: