Question

B. You are approaching a stoplight moving with a velocity of 42.0 m/s. The light turns

yellow, and you apply the brakes and skid to a stop. If your acceleration is 10.0 m/s2,
determine the displacement of the car during the skidding process

Answer 1

Time needed is 2.5 seconds. The distance covered is 31.3 m

Step-by-step explanation:

Answer 2

displacement of the car will be 88.2 m

Step-by-step explanation:

As we know that initial speed of the car is given as

`v_i = 42 m/s`

after complete stop the final speed of the car is

`v_f = 0`

now the deceleration caused due to applied brakes is given as

`a = 10 m/s^2`

now by kinematics we will have

`v_f^2 - v_i^2 = 2 a d`

`0 - 42^2 = 2(-10)d`

`d = 88.2 m`