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Answer:
1.answer- the amount of force acting per unit area of an of an object is known as pressure.
2.answer(i )- force can stop motion of an object.
(ii ) -force can produce motion in an object.
3.answer-they wear a special designed suit to maintain a normal pressure for their bodies as the pressure of water is high and that suit also help them to move easily in water
4.answer-it is easier to walk in soft sand with flat shoe because it occupy more area,hence reduce pressure on the sand while sharp heel increase pressure on sand and make it hard to walk on the sand.
5.answer-force is a push or pull acting on a body which changes it states of rest or motion.
contact force- the force which act directly when two object are in physical contact with each are called contact force
non- contact force- the force act on a body without any physical contact with it.
Explanation:
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