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March 27, 2017

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an object is thrown upward with an initial velocity 'u' m/s. derive an expression for the height 'h' at which its kinetic energy becomes equal to its potential energy.

  • physics - ,

    h=(u²- v²)/2g
    v²=u²- 2gh,
    KE=m•v²/2= m(u²- 2gh)/2,
    KE=PE =>
    m(u²- 2gh)/2 =mgh,
    (u²- 2gh)/2= gh,
    u²=4gh,
    h= u²/4g.

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