Types of levers

Levers were first described in 260 B.C by the Greek scientist ..............

• Archimedes

• El-Hassan Ibn El-Haitham

• Newton

• Mendel

The lever rotates around a fixed point called ................ .

• resistance force

• fulcrum

• effort force

• a rigid bar

........... is a rigid bar that rotates around fulcrum, and is affected by an effort force and a resistance force.

• Lever

• Solution

• Mixture

• Friction force

............ have the resistance force between the effort force and fulcrum.

• Third class levers

• First class levers

• Second class levers

• Fourth class levers

Water pump is a .....

• first class lever

• second class lever

• third class lever

• fourth class lever

.......... increases the speed of objects that we affect them.

• Manual broom

• Seesaw

• Hockey bat

• Coal holder

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

............. is a lever from the 3rd order.

• Sweet holder

• Scissors

• Nutcracker

• Nail clippers

In the first class levers, the resistance is between the effort force and fulcrum.

• ✔

• ✘

The fulcrum of any lever is always between force and resistance.

• ✘

• ✔

Tweezers are used to ........... .

• move a heavy load

• increase the speed of the ball

• pick up very small objects

• hold the cold materials

Tags

NGSS.K-2-ETS1-2