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5/40 MCQs for:

Dynamics: Newton’s Laws of Motion

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?

2.0 m/s².

3.3 m/s².

1.5 m/s².

1.9 m/s².

A horizontal force of 5.0 N accelerates a 4.0kg mass, from rest, at a rate of 0.50 m/s2 in the positive direction. What friction force acts on the mass?

2.0 N.

3.0 N.

4.0 N.

5.0 N.

When you sit on a chair, the resultant force on you is:

Down.

Up.

Zero.

Depending on your weight.

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?

32 kg.

8.0 kg.

78 kg.

4.0 kg.

When the rocket engines on the starship NO-PAIN-NO-GAIN are suddenly turned off, while traveling in empty space, the starship will:

Slowly slow down, and then stop.

Go faster and faster.

Stop immediately.

Move with constant speed.