Simple Machines

Front

What is the benefit of a simple machine?

Back

It allows us to move objects more easily.

Front

What is an axle?

Back

The rod around which wheels rotate.

Front

What is fulcrum?

Back

A fixed point around which a wheel and axle rotate

Front

Why don't we just remove the wheel and turn the axle?

Back

Turning the axle directly requires too much effort

Front

A wheel and axle is basically just a rotating version of what?

Back

lever

Front

In a doorknob, what part functions as the wheel?

Back

The knob itself

Front

Where on a bicycle might you find a pulley?

Back

The gears

Front

In a single pulley, what is the relationship between the effort and resistance forces?

Back

The effort and resistance forces are equal

Front

Pulley system with a mechanical advantage of 3: How far to pull the rope to lift a boulder 10 meters?

Back

30 meters

Front

Why is it easier to lift heavy objects with a double-pulley system?

Back

The effort force is one-half the resistance force.