EVS QUIZ_CLASS 4_SA2

A ______ is needed to make a stationary object move.

An inclined plane wrapped around a pole.

• Lever

• Screw

• Wheel

The force of gravity in the moon is _____ of the force of gravity on the Earth.

• One-fifth

• One-fourth

• One-sixth

An English scientist who discovered the force of gravity.

A measure of the pull of gravity on objects.

• Weight

• Mass

• Volume

Which effect of force is shown below?

• Forces are applied in opposite directions.

• Forces can move an object.

• Forces can stop a moving object.

Energy is the ability to do work.

• True

• False

When you rub your hand heat energy is generated because of _____

• Muscular force

• Frictional force

• Electrostatic force

The device used to raise a flag up a flag pole is an example of a

• lever

• 
  pulley

• wheel and axle

A _____ is a fixed bar that is free to move around a fixed point known as a fulcrum.