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The bob of a simple pendulum of length l...

The bob of a simple pendulum of length l dropped from a horizontal position strikes a block of the same mass, placed on a horizontal table (frictionless) as shown in the diagram, the block shall have kinetic energy-

A

Zero

B

mgl.

C

1/2 mgl.

D

2mgl.

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • The bob of a simple pendulum (mass m and length l ) dropped from a horizontal position strikes a block of the same mass elastically placed on a horizontal frictionless table. The K.E. of the block will be

    A
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    D
    0

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    A
    2 mgl
    B
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    C
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  • A simple pendulum of length hangs from a horizontal roof as shown in figure. The bob of mass m is given an initial horizontal velocity of magnitude sqrt(5 gl) as shown in figure. The coefficient of restitution e = (1)/(2) . After how many collisions the bob shall no long come into constant with the horizonrtal roof?

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