Question

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 padsl . What must the car's deceleration be if the car is to stop just before it reaches the child.

pls answer it fast guys

Answer 1

-30m/s is the decleration of the car when breaks are applied

Answer 2

I think the car stops before the child and it length is 10m before the child