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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 as the bus comes to an immediate stop. What force caused you to fall forward?

A student pulls a box of books on a smooth horizontal floor with a force of 100 N in a direction of 370 above the horizontal. If the mass of the box and the books is 40.0 kg, what is the acceleration of the box?

A student pulls a box of books on a smooth horizontal floor with a force of 100 N in a direction of 37.00 above the horizontal. If the mass of the box and the books is 40.0 kg, what is the normal force on the box?

A 10-kg box sitting on a horizontal surface is pulled by a 5.0-N force. A 3.0-N friction force retards the motion. What is the acceleration of the object?