Work and Energy

Work is done when:-

• force is applied

• displacement isn't there

• displacement is there

• we eat apples

(a)   is the capacity to do work.

Can a vertical force stop a horizontal force?

(a)  

Formula of Work is:-

• Work = Force × Displacement

• Work = Fabric × Solids

• Work = Watermelons × Mangoes

• Work = Energy × Laptops

Natural Sources of Light Energy :-

• LED

• Sun

• Fireflies

• Human Beings

Device used to change light energy into electricity?

(a)  

Electric bell uses __________ energy.

• Sound

• Electrical

• Light

• Heat

Main use of solar cells is to power up (a)   .

The Natural source of heat is :-

• Sun

• Lamps

• LED

• Houses

Beating of drums is an example of which type of energy :-

(a)