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Work, Power And Energy
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05/11/2021 11:10 am
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A body of mass 2kg is thrown vertically upwards with an initial velocity of 20 m/s. What will be its potential energy at the end of 2s?
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05/11/2021 11:13 am
Mass of the body, m = 2 kg
Initial velocity, u = 20 m/s
Acceleration due to gravity, g = 10 m/s2
Height reached = h
Time, t = 2 s
Using second equation of motion, h = ut = \(\frac{1}{2}gt^2\)
h = 20 m
PE after 2 s = mgh = 400J