A body of mass 2kg is thrown up vertically with a kinetic energy of 490J. If g=9.8m/s2, the height at which the kinetic energy of the body becomes half the original value is
(a)50m (b)25m (c)12.5m (d)10m
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energy conversation K 1 - K2 is equal to MGH for 90 - 490 / 2 is equal to 2 multiplied 9.8 Into X 245 is equal to 19.6 hours hours is equal to 245 by 19.6 hours is equal to 12.5 minutes
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