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Free_Kalibri [48]
3 years ago
15

A car moves in a straight line such that for a

Physics
1 answer:
jeyben [28]3 years ago
3 0

Answer:

s = 90 m

a = 56 m/s²

Explanation:

I will ASSUME that your equation is silly as it reduces to V = 11t which is constant, and that you mean V = 9t² + 2t

Position is the integral of differential velocities

s = \int\limits^3_0 {9t^2 + 2t} \, dt

s = 3t³ + t² | from 0 to 3

s = 3(3)³ + 3² - (0) = 90 m

acceleration is the derivative of velocity

a = v' = 18t + 2

a(3) = 18(3) + 2 = 56 m/s²

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aivan3 [116]

Answer:

option B

Explanation:

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s = \dfrac{1}{2}gt^2

t = \sqrt{\dfrac{2s}{g}}

t = \sqrt{\dfrac{2\times 100}{9.8}}

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