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A stone is thrown up with a velocity and comes down, what is the change in kinetic energy of stone?

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in Basic Chemical Engineering by (74.6k points)
A stone is thrown up with a velocity and comes down, what is the change in kinetic energy of stone?

(a) Positive

(b) Negative

(c) Zero

(d) Cannot say

The question was asked in a job interview.

My question is from Potential Energy and Kinetic Energy topic in section Introduction to Energy Balances for Processes without Reaction and Calculation of Enthalpy Changes of Basic Chemical Engineering

1 Answer

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Best answer
Right choice is (c) Zero

Best explanation: According to the conservation of energy, during a process change in total energy will always be zero, if the stone comes to the same level the change in potential energy becomes zero so the change in kinetic energy also becomes zero.

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