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Question 60
An object weighing 20 kg is raised through a height of 2 m. What will be the work done by the force of gravity in this process ?(Take g = 10 m/s$$^2$$)
Solution
iven,
mass of the object=20kg
height attained =2m
acceleration due to gravity $$g = 10 m/s$$^2$$
work done= Fs
work done =mgh (∵ F can also be written as mg)
$$work done=20\times10\times2$$
∴work done=400 J
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