WTMA - Wiesen Test of Mechanical Aptitude Energy, Work, and Power Questions and Answers

Question 1

A weightlifter holds a 100 kg barbell stationary above his head for 10 seconds. How much work is done on the barbell by the weightlifter during this time?

Accepted Answer

0 Joules

Answer

100 Joules

Answer

1,000 Joules

Answer

9,800 Joules

Question 2

Two movers, Alex and Ben, lift identical pianos to the same second-story window. Alex lifts the piano in 2 minutes, while Ben takes 4 minutes. Which of the following statements is true?

Accepted Answer

Alex and Ben do the same amount of work, but Alex uses more power.

Answer

Ben does more work than Alex, but uses less power.

Answer

Alex and Ben do the same amount of work and use the same amount of power.

Answer

Alex does more work than Ben and uses more power.

Question 3

A child at the top of a playground slide is momentarily still before starting to slide down. At this highest point, the child's energy is primarily in what form?

Accepted Answer

Potential Energy

Answer

Kinetic Energy

Answer

Thermal Energy

Answer

Chemical Energy

Question 4

An electric motor's ability to do work over a period of time is rated in a specific unit. Which of the following is the standard unit of power?

Accepted Answer

Watt

Answer

Joule

Answer

Newton

Answer

Pascal

Question 5

Which of the following actions results in the greatest increase in an object's gravitational potential energy?

Accepted Answer

Lifting a 5 kg box onto a 2-meter high shelf.

Answer

Sliding a 10 kg box horizontally across a 5-meter floor.

Answer

Compressing a spring by 10 centimeters.

Answer

Lowering a 20 kg box from a truck to the ground.

Question 6

A pendulum swings back and forth. Ignoring air resistance, at which point in its swing does the pendulum bob have the maximum kinetic energy?

Accepted Answer

At the lowest point of its swing.

Answer

At the highest point of its swing.

Answer

Halfway between the highest and lowest points.

Answer

The kinetic energy is constant throughout the swing.