A person holds a suitcase of mass 5 kg at a height of 50 cm for 1 hour. (i) What is the work done by him. (ii) What is the Potential energy of the suitcase ? (g = 10 m/s^2)
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1)The work done is given by W=Force x displacement
but here the displacement =0 he only apply the force to hold the suitcase
Therefore work done =0
2)given,
mass m=5kg and g=10m/sec.square
I hope this will help you....
height =50cm=0.5metre
time t=1hour =1x60 x60 second
then, potential energy P.E=mgh
P.E=5x10x0.5
P.E=25joules
but here the displacement =0 he only apply the force to hold the suitcase
Therefore work done =0
2)given,
mass m=5kg and g=10m/sec.square
I hope this will help you....
height =50cm=0.5metre
time t=1hour =1x60 x60 second
then, potential energy P.E=mgh
P.E=5x10x0.5
P.E=25joules
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