types of levers

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

• resistance force.

• fulcrum.

• effort force.

• a rigid bar.

Levers were first described in 260 B.0 by the Greek scientist

• a. Archimedes.

• b. El-Hassan Ibn El-Haitham.

• c. Newton.

• d. Mendel.

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

• a. Lever

• b. Solution

• c. Mixture

• d. Friction force

5. The force is exerted by a person to equilibrate the resistance.

• a. fulcrum

• b. effort force

• c. friction

• d. (a) and (b)

Any lever consists of...................

• a. a resistance force (R).

• b. an effort force (F).

• c. a fulcrum (0).

• d. (a) , (b) and (c).

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

• a. increasing speed.

• b. increasing force.

• c. increasing size.

• d. accuracy in performance.

8.................  is a lever that uses a small force to make a great effort.

• a. Crowbar

• b. Hockey bat

• c. ice holder •

• d. Manual broom

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

• a. Manual broom

• b. Seesaw

• c. Hockey bat

• d. Coal holder

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS3-1

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

• a. move a heavy load.

• b. increase the speed of the ball.

• c. pick up very small objects.

• d. hold the cold materials.

11. Which of the following levers is used to avoid dangers ?

• a. Coal holder.

• b. Scissors.

• c. Seesaw.

• d. Manual broom.

Tags

NGSS.MS-ETS1-2