Q. 35.0( 2 Votes )

A body of m

Answer :

Mass of body = 5kg = m

Initial speed = 10m/s = u


Kinetic energy =


= × 5kg × (10m/s)2


= × 5 × 100


= 250J


Final speed = 0m/s (at highest point)


Using 3rd equation of motion.


v2 = u2 – 2gs


(0)2 = (10m/s)2 – 2(9.8m/s2) s


0 = 100 – 19.6s


–100 = –19.6s


= s


5.102m = s = h


Potential energy = mgh


= 5 × 9.8 × 5.102


= 249.98J = 250J (approx.)


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