Question

the work done in lifting a body of mass 20 kg and specific gravity 3.2 to a height of 8m in water is?

Answer 1

Answer:

Explanation:

Hey,

Solution of your query is as following..

=> It is given that,

Mass of body = 20 kg  

Specific gravity = 3.2

=> The mass of the water that will be displaced by body:

20 / 3.2 = 6.25 kg

=> The force exert on the body downwards because of gravity :

20 * 10 = 200 N

=> The force exerted by water in upward direction:

6.25 * 10 = 62.5 N

Thus, total force = 200 − 62.5 = 137.5 N

=> The work done in lifting a body to a height of 8 m:

137.5 *  8 = 1100 J

Hence, the work done in lifting a body to a given height is 1100 joule.

Answer 2

Answer:

hope it helps you friend