Mechanical Aptitude Simple Machines and Mechanical Advantage Questions and Answers

Question 1

An inclined plane is 10 feet long and 2 feet high. What is its mechanical advantage?

Accepted Answer

5

Answer

2

Answer

8

Answer

20

Question 2

A wheel and axle has a wheel radius of 12 inches and an axle radius of 3 inches. What is its mechanical advantage?

Accepted Answer

4

Answer

3

Answer

9

Answer

36

Question 3

Which simple machine is essentially an inclined plane wrapped around a cylinder?

Accepted Answer

Screw

Answer

Lever

Answer

Wedge

Answer

Pulley

Question 4

A wedge is 6 inches long and 2 inches thick at its widest point. What is its mechanical advantage?

Accepted Answer

3

Answer

12

Answer

8

Answer

4

Question 5

In mechanical terms, work is defined as:

Accepted Answer

Force × Distance

Answer

Force × Time

Answer

Mass × Acceleration

Answer

Power × Time

Question 6

A fixed pulley changes the _______ of the applied force but NOT the _______.

Accepted Answer

direction; magnitude

Answer

magnitude; direction

Answer

speed; force

Answer

weight; effort

Question 7

A machine has a mechanical advantage of 4. If you apply 50 lbs of force, what is the output force (ignoring friction)?

Accepted Answer

200 lbs

Answer

12.5 lbs

Answer

54 lbs

Answer

400 lbs