Work, Force and Energy

When dose an object moves?

• only when we push it

• only when we pull it

• when we pull or push it

• only when there is friction

When work is done?

• When force is applied on an object

• When force is is applied and the object moves

• When an object dose not move

• When an object stops moving

What is a force?

• a push or a pull

• a force that slows or stops an object in motion

A football is kicked by a boy. It rolls on the ground to some distance and stops. The force which stops the ball is _______.

• muscular force

• gravitational force

• mechanical force

• frictional force

The Earth attracts all objects towards itself with a force called the

• buoyant force

• gravitational force

• frictional force

What is energy?

• Energy is the distance moved by a human being.

• Energy is the ability to move objects without force.

• Energy is the ability to do work.

Energy generated from moving air is called ____

• solar energy

• wind energy

• heat energy

Some examples for force are

• Static force

• Gravatational force

• People force

• Frictional force

Work is not always done when _____ is applied

• Energy

• Force

• Gravity

• Friction