We can find the car's final velocity from the kinematic equation:
vf=vi+at,here, vi=5.0ms−1 is the initial velocity of the car, vf is the final velocity of the car, a=1.2ms−2 is the acceleration of the car and t=4.0s is the time during which the car accelerates.
Then, we get:
vf=vi+at=5.0sm+1.2s2m⋅4.0s=9.8sm.Answer:
vf=9.8sm.
Comments