A bag of mass 50kg is lifted from the floor to a shelf at a height of 20m. Calculate
the work done in this case. (Take g= 10m/s2). class 9
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Gravitational potential energy is given by the expression,
W= m g h
where,
h = Height above the ground =10m
m=Mass of the object =50kg
g=Acceleration due to gravity =10 ms^-2
W = 50 x 10 x 10 = 5000 J.
At half-way down, the potential energy of the object will be, 5000÷2 =2500J
At this point, the object has an equal amount of potential and kinetic energy. This is due to the law of conservation of energy. Hence, half-way down, the kinetic energy of the object will also be 2500 J.
For further info Click below,
https://www.topperlearning.com/answer/an-object-of-mass-50kg-is-raised-to-a-hight-of-10m-above-the-ground-find-the-potential-energy-of-the-object-at-the-higest-point-if-the-object-is-allow/8n1mqn33
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