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On a planet X, a man throws a 500 g mass...

On a planet X, a man throws a 500 g mass with a speed of 20 m`cdot s^(-1)` and catches it as it comes down 20 second later. Find the weight of the mass (in unit).

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Knowledge Check

  • Read the following passages carefully and answer the questions at the end of them. A ball of mass 200 g is thrown with a speed 20 m cdot s^(-1) . The ball strikes a bat and rebounds along the same line at a speed of 40 m cdot s^(-1) . Variation in the interaction force, as long as the ball remains in contact with the bat, is shown in . What is the speed of the ball at the instant the force acting on it is maximum?

    A
    40 m`cdot s^(-1)`
    B
    30 m`cdot s^(-1)`
    C
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    D
    10 m`cdot s^(-1)`

  • When a bullet of 6g mass hits a target at a speed of 400m cdot s^(-1) , 70% of its energy is converted into heat. The value of heat generated is

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    D
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