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प्रश्न
A metal ball of mass 2kg is allowed to fall freely from rest from a height of 5m above the ground.
What the kinetic energy of the ball just before it hits the ground ?
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उत्तर
Kinetic energy of the ball just before hitting the ground =
Initial potential energy= mgh=2 x 10 x 5 = 100 J
संबंधित प्रश्न
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Give one example when:
Sound energy changes to electric energy.
A ball of mass 50 g falls from a height of 2m and rebounds from the ground to 1.6 m. Find:
(i) The potential energy possessed by the ball when initially at rest.
(ii) The kinetic energy of the ball before it hits the ground.
(iii) The final potential energy of the ball.
(iv) The loss in kinetic energy of the ball on collision. (Take: g = 10N kg−1)
