A reduction of 20% in the price of tea would enable person to obtain 4kg more for rs100 what is the reduced price and the original price
Answers
Step-by-step explanation:
When we push a box lying on the floor with a small amount of force, it does not move at
all. It means the surface of the floor, on which box is resting, exerts some force on the
box which act in a direction opposite to the force of our push. Let us take another
example. A ball moving on the ground slows down gradually and stops after covering
some distance. This means ground exert force on the moving ball to oppose its motion.
This force occurs between the two surfaces which are in contact with each other.
(a) Name the force which always opposes the motion of one object over another object.
(b) Is it contact or non contact force?
(c) How can we reduce the effect of such force on the motion of an object? Mention
any one way.
(d) On what factors does this force depend on?