a man climbs a wall that has a height of 8.4 meters and gains a potential energy of 4620 joules. his mass is about?
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height(h)=8.4 metres
gravitation(g)=9.8m/s square
P.E.=4620 J
m=?
potential energy =mgh
4620=m*9.8*8.4
m=4620/82.32
m=56.12 kg
hence the mass of the object or body is 56.12 kg
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Let the man's mass be m kg.
Work done= mgh
mgh=4620
8.4*10m=4620
84 m= 4620
m= 4620/84= 55 kg
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