FCTC Pulleys, Gears, and Levers 2

Question 1

A compound pulley system uses 4 rope segments supporting a load. If the load weighs 200 lbs, what force is needed to lift it (ignoring friction)?

Accepted Answer

50 lbs

Answer

25 lbs

Answer

100 lbs

Answer

200 lbs

Question 2

Which class of lever has the fulcrum located between the effort and the load?

Accepted Answer

First-class lever

Answer

Second-class lever

Answer

Third-class lever

Answer

Fourth-class lever

Question 3

Two meshing gears have 20 teeth and 60 teeth respectively. If the smaller gear turns at 90 RPM, how fast does the larger gear turn?

Accepted Answer

30 RPM

Answer

270 RPM

Answer

90 RPM

Answer

45 RPM

Question 4

A wheelbarrow is an example of which class of lever?

Accepted Answer

Second-class

Answer

First-class

Answer

Third-class

Answer

Compound lever

Question 5

What happens to the speed of a driven gear when it has more teeth than the driving gear?

Accepted Answer

Speed decreases

Answer

Speed increases

Answer

Speed stays the same

Answer

Speed doubles

Question 6

A fixed pulley attached to the ceiling changes which of the following?

Accepted Answer

The direction of the applied force

Answer

The amount of force needed

Answer

Both force and direction

Answer

Neither force nor direction

Question 7

A lever arm is 6 feet long with the fulcrum 2 feet from the load end. What is the mechanical advantage?

Accepted Answer

2

Answer

3

Answer

4

Answer

6