WTMA - Wiesen Test of Mechanical Aptitude Force, Motion, and Friction Questions and Answers

Question 1

An object is pushed across a rough, horizontal surface at a constant velocity. Which of the following statements is true regarding the forces acting on the object?

Accepted Answer

The force of friction is equal to the applied force.

Answer

The applied force is greater than the force of friction.

Answer

The net force on the object is greater than zero.

Answer

The force of gravity is less than the normal force.

Question 2

A person is trying to push a heavy crate across a floor but it does not move. Which type of friction is preventing the crate from moving?

Accepted Answer

Static friction

Answer

Kinetic friction

Answer

Rolling friction

Answer

Fluid friction

Question 3

If the force applied to an object is doubled, while its mass remains constant, what is the effect on its acceleration?

Accepted Answer

It is doubled.

Answer

It is quartered.

Answer

It is halved.

Answer

It remains the same.

Question 4

A block is sliding down a frictionless ramp. Which of the following forces is responsible for its acceleration down the ramp?

Accepted Answer

The component of gravity parallel to the ramp's surface.

Answer

The normal force from the ramp.

Answer

The force of kinetic friction.

Answer

The full force of gravity acting straight down.

Question 5

Which of the following actions would increase the kinetic friction between a moving sled and the snowy ground?

Accepted Answer

Adding more weight to the sled.

Answer

Decreasing the surface area of the sled's runners.

Answer

Applying a layer of wax to the sled's runners.

Answer

Pushing the sled at a higher speed.

Question 6

According to Newton's Third Law of Motion, if a person pushes against a wall with a force of 50 Newtons, what is the force exerted by the wall on the person?

Accepted Answer

50 Newtons in the opposite direction.

Answer

0 Newtons, because the wall does not move.

Answer

Less than 50 Newtons.

Answer

More than 50 Newtons.