Force

FORCE:

“Force is an agent that changes or tends to change the state of rest or uniform motion of an object or changes the direction or shape of an object”.

• Force is needed to move a car.

• Force causes the spring to stretch.

• We need force to lift some luggage.

• By applying force on plastic ruler we can change its shape.

FORCE ACTING ON SOLIDS:

Solids have definite shapes and sizes, however it is possible to change their shapes and sizes by applying external forces. When the external force is removed, the object tends to return to its original shape and size. This behavior is called “elastic behavior”.

• Solids can be stretched, squashed, bend or twisted by the action of external force.