Work Energy And Power Ques 66

A shell is fired from a cannon, it explodes in mid air, its total energy is conserved

[1994]

(a) momentum increases with velocity

(b) momentum decreases

(c) K.E. increases

(d) K.E. decreases

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Answer:

Correct Answer: 66.(c)

Solution:

When a shell explodes in mid air its chemical energy is partly converted into mechanical energy, hence kinetic energy increases.