Question

A stone of mass 800 gram is thrown with 20 m/s, then after some time it breakdown into two pieces 1 of 300 gram

moving at 15 m/s, find the speed of other part ?​

Answer 1

Answer:

56.25

Explanation:

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11th

Physics

Work, Energy and Power

Energy Conversions

A stone of mass 500g is thr...

PHYSICS

A stone of mass 500g is thrown vertically upwards with a velocity of 15ms

−1

. Calculate the potential energy at the greatest height.

MEDIUM

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ANSWER

Kinetic Energy, K.E=0.5×m×v

2

K.E=0.5×0.5×15×15=56.25J

As it has 56.25 J at the initial point as total energy, at some point X,Potential Energy(P.E.) is maximum.

Total energy=P.E.+K.E.

56.25=P.E.+K.E.

As energy is conserved total energy at point X also must be 40 J.

For P.E to be maximum K.E. must be zero.

Hence P.E.=56.25J

We can come to the conclusion that potential energy will have the maximum value at maximum height