Gears

Which of the following use gears?

• Canal or river locks

• Wind-up toys

• Lifts

• bicycles

Tags

NGSS.MS-PS2-1

The _____ gear doesn't change the gear ratio

• driver

• driven

• idler

• spur

_______ gears transmit rotations in perpendicular directions, that is, their axles are perpendicular, like bevel gears.

• Rack and Pinion

• Compound

• Bevel

• Worm

Tags

NGSS.MS-PS2-1

Which of the following items do not have gears?

• A non-digital Clock

• A lift

• An axe

• Wind-up toys

What is a wheel with teeth called?

• pulley

• gear

• screw

• lever

​ (a)   function in a similar way to a belt system or a pulley system.

• Gears

• Drivers

Tags

NGSS.MS-PS2-2

The number of teeth on the gear will determine the ​ (a)   ​ it takes to turn the other gear.

• number of rotations

• amount of force

Tags

NGSS.MS-ETS1-1

Gears are used to transfer ​ (a)   from one shaft to another to change the direction of rotation and ​ (b)   .

• power

• speed

• force

Tags

NGSS.MS-PS3-5

Gear wheel combinations of different diameters are used to ​ ​ (a)  

• increase or decrease speed.

• change the direction of a force.

The gear is a ​ (a)   with elements of the lever in both the tooth-to-tooth interaction between the gear teeth & the transmission of power from one wheel to another as in a wheel & axle.

• compound machine

• simple machine

Tags

NGSS.MS-PS2-1