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Swimming is an interesting sport, and on...

Swimming is an interesting sport, and one that relaxes us also. Normally and average human being would drown in water.As a person goes inside water , the water exert a force on it in upwared direction. This force is called buyont froce. The force is given by V dg, where d is density of water, V is volume of body inside water and g is acceleration due to gravity. normally, this force is lesser than this weight. so the man pushes water to get an additional force on himself. this effort is known as swimming. assume water has a density of `1000 kg//m^(3)`
A man of mass 50 kg has a volume of `0.045 m^(3)`. how much force should be apply on water to just stay afloat?

A

50 N down

B

50 N up

C

100 N down

D

10 0 N up

Text Solution

Verified by Experts

The correct Answer is:
A

F+45 g =50 g
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Swimming is an interesting sport, and one that relaxes us also. Normally and average human being would drown in water.As a person goes inside water , the water exert a force on it in upwared direction. This force is called buyont froce. The force is given by V dg, where d is density of water, V is volume of body inside water and g is acceleration due to gravity. normally, this force is lesser than this weight. so the man pushes water to get an additional force on himself. this effort is known as swimming. assume water has a density of 1000 kg//m^(3) If a sphere is resting on the ocean floor, its free body diagram would be

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