Gears and Levers

What does a lever need for it to work?

• A rope

• A wheel

• Some teeth

• A pivot

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

How many parts does a lever have?

• 1

• 2

• 3

• 4

Which mechanisms use wheels to work?

• Gears

• Pulleys

• Levers

This simple machine is a ....

• ... inclined plane

• ... pulley

• ... lever.

This simple machine is a ...

• ... inclined plane

• ... pulley

• ... lever

• Wedge

• Wheel and axle

• Screw

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

NGSS.MS-ETS1-4

NGSS.MS-PS2-1

What is a lever?

• It is a flexible bar that rests on a fixed point.

• It is a rigid circle that rests on a fixed point.

• It is a rigid bar that rests on a fixed point.

What is the primary function of gears in a mechanical system?

• To increase speed

• To change the direction of motion

• To transmit torque

• To reduce friction

Which of the following is an example of a first-class lever?

• Scissors

• Wheelbarrow

• Nutcracker

• Tweezers

In a gear train, if the driving gear has 20 teeth and the driven gear has 40 teeth, what is the gear ratio?

• 1:2

• 2:1

• 1:1

• 4:1