Question

The ball of mass 1 kg is thrown upward reach a maximum height of 4m.Calculate the work done by the force of gravity during the vertical displacement

Answer 1

We know that work done by gravity is mgh

where

m = mass

g = acceleration due to gravity

h = height

Given,

m = 1 kg

g = 10 m/s^2 or 9.8 m/s^2

h=4 m

Work = 4*10*1 J

=40 J

or if you take g as 9.8 then

Work is 9.8 * 1*4

=39.2 J

The answer is 40 J as no value of g is given and I have taken g to be 10

Hope it helps

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Answer 2

4*10*1

==40 J

The energy is 40 J

Hope it helps