OAR OAR Mechanical Comprehension: Simple Machines 3

Question 1

A compound pulley system has 4 rope segments supporting the load. What is the mechanical advantage?

Accepted Answer

4

Answer

1

Answer

2

Answer

3

Question 2

A third-class lever has the effort applied between the fulcrum and the load. What is a real-world example?

Accepted Answer

Fishing rod

Answer

Crowbar

Answer

Wheelbarrow

Answer

Nutcracker

Question 3

If a lever arm on the effort side is 4 times longer than the resistance side, the lever provides a mechanical advantage of:

Accepted Answer

4

Answer

0.25

Answer

1

Answer

2

Question 4

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

Accepted Answer

Screw

Answer

Pulley

Answer

Wheel and axle

Answer

Wedge

Question 5

A movable pulley is attached to a load. Compared to no pulley, lifting the load requires:

Accepted Answer

Half the force over twice the distance

Answer

Twice the force over the same distance

Answer

The same force over half the distance

Answer

Half the force over half the distance

Question 6

An axe blade is a type of which simple machine?

Accepted Answer

Wedge

Answer

Lever

Answer

Screw

Answer

Inclined plane

Question 7

A bolt and nut system works because the nut acts as which simple machine?

Accepted Answer

A screw

Answer

A lever

Answer

A fixed pulley

Answer

A wheel and axle