A Labour whose own mass is 50kg carries a load of an additional block of 60kg on his head to the top of a building 15m high. Find the total work done by him. Also find the work done by him if he carries another additional block of 10kg to the same height.
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Answered by
3
Answer:
total mass = 50 +60 =110 kg
s=15
work done =0
because force and displacement are perpendicular to each other.
Answered by
1
Answer:
Given, total mass, m = 50 + 60 = 110 kg Displacement, s =15 m Work done by him is given by W = Fs cos 0 [Here, 0 = 90°, since force and displacement are perpendicular to each other.]
W = mgs cos90° = 110 x 9.8 x 15 cos90°
W =0
If additional block of mass 10 kg is carried by him to the same height, then also work done by him remains zero because force and displacement are perpendicular to each other (i.e. 0 = 90°).
MARK A BRAINLIEST
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