A rod of mass m and length l is lying on a horizontal table. The work done in making it stand on one end will be
A
mgl
B
C
D
2mgl
Text Solution
Verified by ExpertsThe correct answer is:
B
When the rod is lying on a horizontal table, its potential energy = 0
But when we make its stand vertical its center of mass rises upto high 
. So, it's potential energy 
∴ ∴ Work done = charge in potential energy
.
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