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In the given figure, the block of mass m is dropped from the point ‘A’. The expression for kinetic energy of block when it reaches point ‘B’ is

Option 1 -

1 2 m g     y 0 2

Option 2 -

1 2 m g     y 2

Option 3 -

mg (y – y0)         

Option 4 -

mg y0

0 1 View | Posted 2 weeks ago
Asked by Shiksha User

  • 1 Answer

  • V

    Answered by

    Vishal Baghel | Contributor-Level 10

    2 weeks ago
    Correct Option - 4


    Detailed Solution:

    According to conservation of energy, we can write

    Gain in kinetic energy = Loss in potential energy

    =>Kf – Kin = Uin - Uf

    =>K - = mgy – mg (y – y0) = mgy0

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