Questions
The percentage errors in the measurement of mass and speed are 2% and 3% respectively. How much will be the maximum error in the estimate of the kinetic energy obtained by measuring mass and speed
detailed solution
Correct option is B
K.E.=12mv2Δ K.E. K.E. =Δmm+2ΔVV=2100+2×3100×100%Talk to our academic expert!
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A running man has half the kinetic energy than a boy of half his mass has. The man speeds up by I m/sec and then has the same kinetic energy as the boy. What were the original speeds of man and boy respectively?
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