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5/40 MCQs for:
Dynamics: Newton’s Laws of Motion

A stack of books rests on a level frictionless surface. A force F acts on the stack, and it accelerates at 3.0 m/s². A 1.0 kg book is then added to the stack. The same force is applied, and now the stack accelerates at 2.0 m/s². What was the mass of the original stack?

You are standing in a moving bus, facing forward, and you suddenly fall forward. You can imply from this that the bus's:
An object of mass m is hanging by a string from the ceiling of an elevator. The elevator is moving upward, but slowing down. What is the tension in the string?
An object sits on a frictionless surface. A 16-N force is applied to the object, and it accelerates at 2.0 m/s2. What is the mass of the object?

Two toy cars (16 kg and 2.0 kg) are released simultaneously on an inclined plane that makes an angle of 300 with the horizontal. Make a statement which best describes their acceleration after being released.