A body of mass 1kg is traveling with a velocity of 3m/s accelerates uniformly with 8m/s2 to travel for 2s. Find its final momentum
A
19Ns
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B
6Ns
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C
12Ns
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D
20Ns
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Solution
The correct option is A19Ns p=m×v Using equation of motion for relating u and v v=u+at Initial momentum p0=mu=1×3=3Ns Change in momentum Δp=m(v−u)=m×at =1×8×2=16Ns Therefore final momentum p=p0+Δp =3+16=19Ns