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Question

V = 1 - 9t if t<9

V= 5 - 2t if t =10

Find the value of v (m/s) when t = 5


A

-44 m/s

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B

-34 m/s

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C

-14 m/s

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D

-10 m/s

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Solution

The correct option is A

-44 m/s


V = 3 - 9t if t<5 ...(i)

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

When t = 5,

V = 1 - 9(5) = -44 m/s


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