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The percentage error in finding the mass and velocity of body is 5% and 3%
respectively. The percentage error in finding the K.E of that body is:
a. 5%
b. 8%
c. 11%
d. 15%
Answers
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1
KE=1/2MV²
ΔKE/KE=ΔM/M + 2ΔV/V
multiplying by 100 on both sides
ΔKE/KE*100=ΔM/M*100 + 2ΔV/V*100
=5+2*3
=11 %
THE ANSWER IS OPTION c
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