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How much work is done when a body of mas...

How much work is done when a body of mass m is raised to a height h above the ground?

Text Solution

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The correct Answer is:
`m xx g xx h`
NA
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Find the change in the gravitational potential energy when a body of mass m is raised to a height nR above the surface of the earth. (Here, R is the radius of the earth)

Define the term potential energy, and derive its dimensions. Write an expression for the gravitational potential energy of a body of mass m raised to a height h above the earth's surface

Knowledge Check

  • The change in the gravitational potential energy when a body of mass m is raised to a height nR above the surface of the earth is (here R is the radius of the earth)

    A
    `((n)/(n+1))mgR`
    B
    `((n)/(n-1))mgR`
    C
    nmgR
    D
    `(mgR)/(n)`

  • The change in the gravitational potential energy when a body of a mass m is raised to a height nR above the surface of the earth is (here R is the radius of the earth)

    A
    `(mgR)/n`
    B
    `mmgR`
    C
    `(n/(n-1))mgR`
    D
    `(n/(n+1))mgR`

  • The change in potential energy when a body of mass m is raised to a height n R from the earth surface is (R = Radius of earth )

    A
    `mgR (n)/(n - 1)`
    B
    n m gR
    C
    `mgR (n^(2))/( n^(2) - 1)`
    D
    ` mgR (n)/(n + 1)`

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    Find work done in shifting a body of mass m from a height h above the earth's surface to a height 2h above the earth's surface.

    Calculate the work required to raise a body of mass m to a height h just above the earth's surface. Radius of the earth is R and acceleration due to gravity at the earth's surface is g.

    What ids gravitational potential energy ? Obtain an expression for it in case of a body of mass m and at a height h above the Earth's surface.

    A body of mass 1 kg is lifted through a height of 1m, then its work done is

    What is the work done to fits to lift a body of mass 5 kg to a height of 50 m from the ground (in J)? (g = 10 m s^(-2) )

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