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

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 160 m. What are the magnitude and direction of the net force applied to the car to bring it to rest?

in progress 0
Lệ Thu 4 months 2021-09-05T07:02:01+00:00 1 Answers 76 views 0

Answers ( )

    0
    2021-09-05T07:03:09+00:00

    Answer:

    Force applied to stop the car = 1,250 N

    Explanation:

    Given:

    Mass of car (M) = 1,000 kg

    Initial velocity (U) = 20 m/s

    Final velocity (V) = 0 m/s

    Distance (S) = 160 m

    Find:

    Force applied to stop the car.

    Computation:

    v^2 = u^2 + 2as\\\\0^2=20^2+2(a)(160)\\\\0=400+320(a)\\\\Acceleration = a = -1.25m/s^2\\\\Force = ma \\\\Force= 1,000(1.25)\\\\Force = 1,250 N

    Force applied to stop the car = 1,250 N

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )