Explanation:
Given that,
Distance covered, d = 32 m
Time, t = 8.7 m
Final speed of the truck, v = 2.1 m/s
(a) Let a is the acceleration and u is the original speed of the truck.
Using first equation of kinematics as :
..............(1)
Using second equation of kinematics as :
...........(2)
On solving equation (1) and (2) we get :
Original speed,
(b) Acceleration,
Hence, this is the required solution.