How does the effect of force differ when it is applied on a non$-$rigid body?
Answer
When a force is applied on a non-rigid object it changes interspacing between its constituent particle and causes a change in its dimensions and can produce motion in it.
How does the effect of force differ when it is applied on a rigid body?
Answer
When a force applied on a rigid object it does not change the interspacing of constituent molecules and does not change dimensions and can cause motion in it.
Foundation of buildings are kept wide so that the weight of the building may act on a larger area. As a result, it will exert less pressure on the ground. This avoids sinking of building into the earth.
Force: Force is a physical cause that changes or may tend to change the state of rest or the state of motion of an object. The $\text{S.I}.$ unit of force is Newton.
Thrust is a force or a push. When a system pushes or accelerates mass in one direction, there is a thrust $($force$)$ just as large in the opposite direction.
A potter turns his wheel by applying a force through the stick near the rim of wheel.
Answer
A potter's wheel has a wheel pivoted at the centre. The potter turns the wheel by means of a stick at the rim of the wheel. He increases the perpendicular distance.
What do you mean by the clockwise and anti$-$clockwise moment of force?
Answer
Clockwise moment of force $—$ When the moment of force is in the clockwise direction.
Anticlockwise moment $ —$ When the moment of force acts in an anticlockwise direction.