force work and energy

1. Which of the following simple machines would you use to open a soda bottle?

• Lever

• inclined plane

• Screw

• Pulley

2. Choose the odd one out from the properties of screw.

• Has two slanting surfaces

• Simple machine

• Has cylindrical shape

• Can be turned using screwdriver

4. The ability to do work is called________.

• force

• machine

• energy

• work

5. Identify the simple machine which is a form of two inclined planes joined together.

• lever

• wedge

• screw

• wheel and axel

7. Frictional force ______ the motion of an object7.

• opposes

• help

8. We use ______ to make our work easy.

• machine

• muscles

9. Levers are slanting surfaces used to push or pull heavy objects to a certain height.

• true

• false

10.The force applied by the Earth on the object called _________ force.

• Frictional

• muscular

• Gravitational

If Ravi is able to move the table through a distance, then ____ is said to be done.

• work

• force

• energy

• muscles

Which action will need more physical energy

Riding a bicycle on a level road

Or Riding a bicycle up a hill

• Riding a bicycle up a hill

• Riding a bicycle on a level road