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

Answer 1

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.