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Work, Power And Energy
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05/11/2021 4:18 pm
Topic starter
(a) Define the term ‘work’. Write the formula for the work done on a body when a force acts on the body in the direction of its displacement. Give the meaning of each symbol which occurs in the formula.
(b) A person of mass 50kg climbs a tower of height 72 meters. Calculate the work done.
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05/11/2021 4:22 pm
(a) Work is done when an applied force produces motion in a body.
Formula for work done is:
W = Fs Where,
W is the work done
F is the force applied
s is the distance travelled
(b) Mass of the person, m = 50kg
Height of tower, h = 72m
Acceleration due to gravity, g = 9.8 m/s2
Work done, W = mgh = 35280 J