I have this question my teacher made up, but I didnt get to see the answers. Could someone double check these for me:
1.A car of mass 70,000kg travelling horizontally, experiences a total horizontal decelerating force of 1.9 x 10^5 N.
What is the deceleration of the car? ANS: F=ma, 2.71 m/s^2 ?
2.The car travels down a straight road at a speed of 68m/s. Assuming that the decelrating force acting on car is constant, find the distance the car travels along the road until it comes to rest. ANS: a=v-u/t, t=25, s=0.5(u+v)t, s=853m