Question

A ball rolling on the ground gradually slows down and finally comes to rest.
Identify the force responsible for this phenomenon.
A force of 3600 N acts on the surface of area 40 cmnormally.
What would be the pressure on the surface?
)
OR
a)
A solid object that weighs 525 N is placed on a wooden plank and a
pressure of 50 Pa is applied. Calculate the area of contact between the
object and the wooden plank.
What type of materials should be used for making bodies of submarines,
so that they can endure the tremendous pressure exerted by water in deep
seas?
b)​

Answer 1

Answer:

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Answer 2

Explanation:

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