27.
A rod AB of mass 10kg and length 4m rests on a
horizontal floor with end A fixed so as to rotate it in vertical
plane about perpendicular axis passing through A. If the
work done on the rod is 100J , the height to which the end
B be raised vertically above the floor is [Kerala PET 2007]
(a) 1.5 m
(b) 2.0 m
(c) 1.0 m
(d) 2.5 m
Answers
Answered by
6
Answer:
2.5m
Explanation:
no explanation..
Answered by
11
The height at which B will be raised vertically above the floor is 2m
Mass of the rod = 10kg (Given)
Length of the rod = 4m (Given)
Work done on the rod = 100J (Given)
Work done = mgh/2
Therefore,
100 = 10 10 h / 2
100 . 2 = 100h
h = 200/100
h = 2
Therefore, the height to which B will be raised vertically above the floor is 2m
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