WTMA - Wiesen Test of Mechanical Aptitude Center of Gravity and Stability Questions and Answers

Question 1

A modern race car is designed to be very low to the ground with a wide wheelbase. What is the primary physical principle behind this design for enhancing stability?

Accepted Answer

To lower its center of gravity and widen its base of support.

Answer

To increase its overall mass for better road grip.

Answer

To reduce aerodynamic drag and improve top speed.

Answer

To make it easier for the driver to enter and exit the vehicle.

Question 2

An object is in a state of 'unstable equilibrium' if, after being slightly displaced, its center of gravity:

Accepted Answer

Continues to move to an even lower position, causing it to topple.

Answer

Remains at the same height.

Answer

Returns to its original, lower height.

Answer

Moves to a new position but at the same height.

Question 3

Which of the following actions would MOST improve the stability of a tall, empty filing cabinet?

Accepted Answer

Placing heavy items in the bottom drawer.

Answer

Placing heavy items in the top drawer.

Answer

Ensuring all the drawers are closed.

Answer

Painting the cabinet a different color.

Question 4

A worker is carrying a long, heavy plank of wood on his shoulder. To make it easiest to balance, where should the plank's center of gravity be located?

Accepted Answer

Directly above the point of support (his shoulder).

Answer

As far in front of his shoulder as possible.

Answer

As far behind his shoulder as possible.

Answer

The location of the center of gravity does not affect balance.

Question 5

Imagine two solid, identical blocks. Block A is a short, wide cube. Block B is a tall, narrow rectangle standing on its end. Which statement is correct?

Accepted Answer

Block A is more stable because it has a lower center of gravity and a wider base of support.

Answer

Block B is more stable because it is taller.

Answer

Both blocks have equal stability.

Answer

Block B is more stable because it has a smaller base of support.

Question 6

A tightrope walker often carries a long pole. How does this pole help them maintain balance?

Accepted Answer

It effectively lowers the walker's combined center of gravity.

Answer

The pole's weight pushes them down onto the rope more firmly.

Answer

It makes the walker more aerodynamic.

Answer

It increases the walker's total mass, making them harder to move.