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A bullet of mass 10 gm strikes a target
Question
A bullet of mass
$10gm$
strikes a target at a velocity of
$400m/s$
and loses half of its initial velocity. The loss of kinetic energy in joule is:
A
$800$
B
$200$
C
$400$
D
$600$
Medium
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Solution
Verified by Toppr
Correct option is D)
$ΔK.E=21 m(V_{final}−V_{initial})$
$=21 ×10_{−2}((2400 )_{2}−(400)_{2})$
$=21 ×10_{−2}×16×10_{4}×4−3 $
$=−600J$
$⇒$
Loss
$=600J$
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