A car starts from rest and accelerates at a rate of 1 m/s^2 until it reaches a velocity of 7 m/s. It then travels at a constant velocity for the next 15 seconds. The driver then applies the brake, bringing the car to stop. The brakes provide an acceleration of -4 m/s^2.
a) what is the significance of the negative sign of the acceleration provided by the brakes?
b) determine the total amount of time that the car was in motion.
c) draw quantitatively correct graphs of the acceleration, velocity and position of the car as functions of time.
1 answer
1562..3 N