Review

Simple machine that transfers motion from one part of the machine to another

• Inclined Plane
• Gears
• Pulley
• All of them

Tags

NGSS.MS-PS2-1

MOST gears are

• Wheels
• Cylinders
• Both, wheels & cylinders
• I don't know

BIG gears are used for

• More turning power (torque)
• More rotational speed

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

LITTLE gears are used for

• More turning power (torque)
• More rotational speed

Engineers often pair little gears with big gears to 

• Increase speed
• Increase torque

Tags

NGSS.MS-PS2-1

The larger the radius, the ______ force a turning wheel has

• MORE
• LESS

Gears spin in 

• Opposite direction
• Same direction

What is the gear ratio of a gear train with a big gear of 48 teeth and a little gear of 12 teeth?

• 1:4
• 1:3

What does a 1:6 gear ratio mean?

• It means the small gear has to turn 6 times to turn the big gear once.
• It means the big gear has to turn 6 times to turn the small gear once. 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which of the following DOES NOT use gears?

• iPhone

• Car

• Train

• Clock