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Question

V = 3 + 9t if t<9

V= 8 - 2t if t =10

Find the value of v (m/s) when t = 10


A

v = 10 m/s

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B

v = -14 m/s

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C

v = -5 m/s

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D

v = -12 m/s

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Solution

The correct option is D

v = -12 m/s


V = 3 + 9t if t<9 ...(i)

V= 8 - 2t if t =10 ...(ii)

When t = 10,

V= 8 - 2(10) = -12 m/s


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