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OZkid
OZkid asked in Science & MathematicsPhysics · 9 years ago

Physics Motion Question help?

A car moving with an initial velocity decreases it's speed in 10 seconds to 10m/s. During this the car takes 200 meters. Find:

a) Decelaration ?

b) First velocity ?

1 Answer

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  • JullyWum
    Lv 7
    9 years ago
    Favorite Answer

    (b)

    Average velocity = d / t .. .. initial vel = u, final vel v = 10m/s

    (u + v)/2 = d/t

    u = 2d/t - v .. .. (2 x 200m / 10s) - 10.0m/s .. .. ►u = 30.0m/s

    (a)

    Accel. = (v-u) / t .. .. (10 - 30)m/s / 10s .. .. .. .. ►a = - 2.0m/s²

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