force and pressure

Question 1

what is force? name effects of force. and types of force

Answer 1

a push or a pull on an object is called a force.

1. changes state
2. changes size and shape

a. contact force
b. non contact force

Question 2

explain effects of force?

Answer 2

a change in either the speed or direction of an object, or both, is described as a change in state of motion.
a change in shape and size of the object due to the applied force is described as change in shape and size.

Question 3

type of contact force and explain them

Answer 3

1. muscular force- the force resulting due to the action of muscles.
2. frictional force - the force resulting due to the friction between the surface and the object.

Question 4

explain non - contact force and explain me

Answer 4

1. electrostatics force - the force exerted by a charged body on another uncharged body is known as electrostatics force.
2. gravitational force - objects or things fall towards the earth because it pulls them. this force is called force of gravity or gravity.

Question 5

what is pressure? name the unit

Answer 5

the force acting on a unit area of a surface is called pressure.
pressure = force/ area on which is acts
p = f/a

Question 6

difference between pressure of solid, liquid and gas