Four men lift a 175 kg box to a height of 1 m and hold it without raising or lowering it. (a) How much work is done by the men in lifting the box? (b) How much work do they do in just holding it? (c) Why do they get tired while holding it?
Answers
Answered by
0
Answer:
Four men lift a 175 kg box to a height of 1 m and hold it without raising or lowering it. (a) How much work is done by the men in lifting the box? (b) How much work do they do in just holding it? (c) Why do they get tired while holding it?
Explanation:
Four men lift a 175 kg box to a height of 1 m and hold it without raising or lowering it. (a) How much work is done by the men in lifting the box? (b) How much work do they do in just holding it? (c) Why do they get tired while holding it?
Answered by
1
Answer:
a) here - F= mg = 250 × 10 = 2500N
s= 1m
w= fs
2500×1
= 2500J
b) no work is done
c) because they handle the gravitational force acting on the box in downward direction
Attachments:
Similar questions