a. V = Vo + a*t.
V = 0, Vo = 15 m/s, t = 0.3 s., a = ?. a will be negative.
b. F = M*a. F will be negative.
A car mass of 900kg travelling at 15m/s crashes into a wall and comes to rest in 0.3s. Calculate the average decelaration. Calculate the average force exerted
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