An object of mass $5\,kg$ falls from a height of $5\,m$ above the ground. The loss of potential energy of the mass is:

  • A
    $250\,J$
  • B
    $25\,J$
  • C
    $2.5\,kJ$
  • D
    $50\,J$

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Similar Questions

$A$ certain force acting on a $20 \, kg$ mass changes its velocity from $5 \, m \, s^{-1}$ to $2 \, m \, s^{-1}$. Calculate the work done by the force. (in $J$)

$A$ horse of mass $210\, kg$ and a dog of mass $25\, kg$ are running at the same speed. Which of the two possesses more kinetic energy? How?

When a stone of mass $m$ falls through a vertical height $d$,the decrease in the gravitational potential energy is:

$(a)$ The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy? Why?
$(b)$ An object is dropped from a height $h$. When is its
$(i)$ potential energy maximum?
$(ii)$ kinetic energy maximum?

How much work should be done on an object of $120 \, kg$ to increase its speed from $25 \, m s^{-1}$ to $40 \, m s^{-1}$ (in $, J$)?

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