Force, Work and Energy

What is gravity?

• a pulling force between two objects

• the ability to do work

What is friction?

• a force that slows or stops an object in motion

• stored energy that is ready to be used

What is work?

• when a force changes an object's motion or moves an object

• a force that attracts of repels

What is energy?

• the ability to do work

• a pulling force between two objects

What is a force?

• a push or a pull

• a force that slows or stops an object in motion

True or False

Forces stop motion, start motion, speed and slow motion, or change the direction of motion.

• true

• false

Rubbing your hands together is a simple example of ___.

• friction

• work

• potential

Why does an apple fall down when it gets detached from the tree?

• Because it likes the ground

• Due to gravitational force

• Both

• None of these

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

Read the statements carefully and choose the correct option.

Statement A: We get energy from food we eat.

Statement B: We need energy to do work.

• Statement A. is correct B is wrong

• Statement B is correct A is wrong.

• Both the statements are correct.

• Both the statements are wrong.