Between the fulcrum and the effort

At the end, opposite the fulcrum

Between the effort and the fulcrum

At the fulcrum

First-class

Second-class

Third-class

Fourth-class

$$1$$

$$2$$

$$3$$

$$0.33$$

Mechanical advantage is always less than 1

Mechanical advantage is the ratio of load to effort

Mechanical advantage is the ratio of effort arm to load arm

Mechanical advantage is the sum of load and effort

First-class

Second-class

Third-class

None of the above

Spur gear

Bevel gear

Worm gear

Rack and pinion

To increase speed

To decrease speed

To change the direction of rotation

To transmit motion without changing speed or direction

$$1:3$$

$$3:1$$

$$1:2$$

$$2:1$$

The sum of the number of teeth on both gears

The difference in the number of teeth between two gears

The ratio of the number of teeth on the driven gear to the driving gear

The product of the number of teeth on both gears

$$1:5$$

$$5:1$$

$$1:4$$

$$4:1$$

$$1:5$$

$$5:1$$

$$1:4$$

$$4:1$$

First-class

Second-class

Third-class

None of the above

The speed increases

The speed decreases

The speed stays the same

The direction reverses

$$0.33$$

$$3$$

$$2$$

$$1$$