Work Energy And Power Question 224

Question: A rod of mass m and length (is made to stand at an angle of 60 with the vertical. Potential energy of the rod in this position is

Options:

A) mg

B) mg2

C) mg3

D) mg4

Show Answer

Answer:

Correct Answer: D

Solution:

[d] For any uniform rod, the mass is supposed to be concentrated at its centre.
height of the mass from ground is h=(1/2)sin30o

Potential energy of the rod =m×g×2sin30o

=m×g×2×12=mg4



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