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State and prove the work energy theorem ...

State and prove the work energy theorem for constant force.

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State work energy theorem.

State work energy theorem.

Knowledge Check

  • The work-energy theorem states that the change in

    A
    kinetic energy of a particle is equal to the work done on it by the net force
    B
    kinetic energy of a particle is equal to the work done by one of the forces acting on it
    C
    potential energy of the particle is equal to the work done on it by the net force
    D
    potential energy of a particle is equal on it work done by one of the forces acting on it

  • Assertion : Comets move around the sun in elliptical orbits. The gravitational force on the coment due to sun is not normal to the comet's velocity, but the work done by the gravitational force overy every complete orbit of the coment is zero Reason : Gravitational force is a conservative force and the work done by a conservative force over a closed path is always zero

    A
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion
    B
    If both Assertion and Reason are true but Reason is not correct explanation of Assertion
    C
    If Assertion is ture but Reason is false
    D
    If both Assertion and Reason are false

  • Some of the following equations are kinetic equations, where the symbols have their usual meaning. The work -energy theorem is represented by

    A
    `v= u + a t`
    B
    s= ut
    C
    `s= u t + (1)/(2) a t^(2)`
    D
    `v^(2) = u^(2) + 2as`

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    State and explain the work done in the following situation : A man spending his energy by pushing on a concrete wall.

    State and explain the work done in the following situations: A man spending his energy by pushing on a concrete wall.

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