For a body traveling with uniform acceleration its final velocity V=180 - 7x where x is the distance traveled by the body in meters. Then the acceleration is

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–8 m/s2

–3.5 m/s2

–7 m/s2

180 m/s2

answer is B.

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Detailed Solution

V=180−7xV2=180−7x2vdvdx=−7vdvdx=−3.5 m/s2 other method comparing with equation V2=U2+2aS 2a=-7 a==-3.5

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