Exam Science Unit3 The Universe Junior6 Part3

The first class lever differs from the second class lever in …….

All of the following from second lever except——-

——is the form a second class lever

——-is an example of first class levers.

Any lever consists of… … ..

A resistance force depends on…

The ……consists of a resistance force

Lever that has the fulcrum between the force and the resistance…

The lever that uses a small force to make a great effort called…

All the following are functions for levers, except… .

……Class levers always don’t conserve the effort

Force X it’s arm equal to resistance X it’s arm is the law of

The lever conserves effort if the arm of force is …………… the arm of resistance

Lever that has the fulcrum between the force and the resistance……

The distance between the resistance and the fulcrum is known as the arm of………..

See saw is from ………..class levers.

Effort force arm is always bigger than resistance arm in the…….. Class levers.

……….. is an example of first class lever.

An example of the second class lever is the……..

Levers that have the force between the resistance and the fixed point…….

The force and resistance are equal in levers, if. …….

The most common simple machines are………….

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

……….. is a rigid bar that rotates around fulcrum, and is affected by 4. an effort force and a resistance force.

The ……… force is exerted by a person to equilibrate the resistance

All the following are from the importance of levers except ……..

…………Increases the speed of objects that we affect them

Lever that has the fulcrum between the force and the resistance……..

In second class lever if the distance between resistance and fulcrum 15 cm ,so distance between effort force and fulcrum must be equal ……

From the second class lever is……………….

……………is a fixed point that a rigid bar rotates on.

………… is a type of lever that always save effort.

………….is considered from the third class levers

All of the following are from the importance of the levers except

From the levers that are used to avoid danger is ……………..

All of the following levers don’t save effort except………….

Levers were described by…………..

The scissors are two levers of the…………… class lever.

Which of the following levers conserve effort…..

A lever where the resistance lies between effort force & fulcrum ….