A 1000-kg car is driving toward the north along a straight horizontal road at a

Question

A 1000-kg car is driving toward the north along a straight horizontal road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to a rest uniformly in a distance of 170 m. What are the magnitude and direction of the net force applied to the car to bring it to rest? A 1000-kg car is driving toward the north along a straight horizontal road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to a rest uniformly in a distance of 170 m. What are the magnitude and direction of the net force applied to the car to bring it to rest?

Explanation / Answer

a=v^2-u^2/2s

=0-400/340

=-20/17 m/s^2(- indicates deceleration)

F=ma

=-1000x20/17

=-1176.47 N

Direction will be opposite to the direction of motion(SOUTH)

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