Question

a car starts moving on a straight road with constant acceleration of 2m/s . at the same tiime , a truck moving at constant velocity of 20 m/s passes by the car . find the time taken by the car to just overtake the truck.

Answer 1

car overtakes when the displacemt is same for truck and car
displacment s= ut + 1/2×a×t^2
for truck a=0
for car u =0
car s=0.5×2×t^2 = t^2
truck s = 20t
so 20t=t^2
t = 10 s