(2)A car is moving on a straight road. The variation of the car's velocity v with time t is seen in the graph below.
Describe, in terms of acceleration, the motion of the car.
2.A truck with a speed of $20\,m\,s^{−1}$ passes by a stationary car. The car starts to move with an acceleration of $4\,m\,s^{−2}$ just as the truck goes past. Both of the vehicles move in the same direction.
(1)Show that the time needed for the car to overtake the truck is 10 s. t = s
(2)On the graph below, draw the variation in speed of both vehicles with time during the first 10 seconds of the motion and comment about the areas under the graphs without calculation.
(3)In an accident scene, skid marks of a car stretching 100 m are found. According to the manufacturer of the car’s tires, the deceleration that the car experiences with skidding tires is $5 \,m\,s^{−2}$. u= $,s^{-1}$
Determine whether the car exceeded the speed limit of $72\,km\,h^{−1}$.
