A stone of mass 500 g is thrown vertically upwards with a velocity of 15 m/s. Calculate the potential energy at the greatest height, the kinetic energy and reaching the ground and the total energy at it's half way point.
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this would require you to use third law of motion
square of final velocity-square of initial velocity= 2*distance*acceleration
here final velocity(v) is 0 as after reaching top of height the velocity becomes 0
initial velocity is 15 metre per second
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acceleration is -10 metre per second
therefore according to equation answer is 11.25 just distance
and p.e is mgh that is .5*11.25*10
::562.5
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