A car is travelling at 20 m/s along a road. A child runs out into the road 50 m ahead and the car driver steps on the brake pedal. What must the car’s deceleration be if the car is to stop just before it reaches the child?
U = 20m/s
D = 50 m
V = o m/s
On applying the formula, we get
A = 4m/s2