. A simple pendulum is released from A as shown in figure
If m and l represent the mass of the bob and the length of the pendulum respectively, the gain in kinetic energy at B is then
A: mgl2
B: mgl√(2)
C: √(3)2mgl
D: 2√(3)mgl
Best Answer
Explanation:
Let the length of the pendulum =l
So the vertical height of the pendulam h=lcos30
The potential energy loss by the pendulam= kinetic energy of pendulum
Kinetic energy=Mgh
=Mglcos30
=√3/2Mgl
Final Answer:
The gain in kinetic energy of the pendulum is √3/2 Mgl.Hence option(C) is correct.
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