Revise smart, understand Better

5/40 MCQs for:

Dynamics: Newton’s Laws of Motion

A horizontal force accelerates a box from rest across a horizontal surface (friction is present) at a constant rate. The experiment is repeated, and all conditions remain the same with the exception that the horizontal force is doubled. What happens to the box's acceleration?

It increases to exactly double its original value.

It increases somewhat.

It increases to more than double its original value.

It increases to less than double its original value.

A constant net force acts on an object. Describe the motion of the object.

Constant speed.

Constant acceleration.

increasing acceleration.

Constant velocity.

You are standing in a moving bus, facing forward, and you suddenly fall forward. You can imply from this that the bus's:

Velocity decreased.

Velocity increased.

Speed remained the same, but it's turning to the right.

Speed remained the same, but it's turning to the left.

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?

312 N.

292 N.

392 N.

332 N.

A child's toy is suspended from the ceiling by means of a string. The Earth pulls downward on the toy with its weight force of 8.0 N. If this is the 'action force', what is the 'reaction force'?

The string pulling upward on the toy with an 8.0N force.

The string pulling downward on the ceiling with an 8.0N force.

The ceiling pulling upward on the string with an 8.0N force.

The toy pulling upward on the Earth with an 8.0N force.