Question

Assertion :Power of machine gun is determined by both, the number of bullet fired per second and kinetic energy of bullets. Reason: Power of any machine is defined as work done (by it) per unit time.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

K.E. of one bullet = k $\therefore K.E.$ of n bullet = $nk$

According to law of conservation of energy, the kinetic energy of bullets be equal to the work done by machine gun per sec.