Question

Q.The brake applied to a car produce an acceleration of 8m per second square in opposite direction to the motion.If the car takes 5 sec to stop after the application of brake,Calculate the distance it travels during this time

Answer 1

Answer:

Acceleration a = -8 m/s^2

Time t = 5 s

Final velocity v = 0 m/s

Let initial velocity be u

Let distance be s

v = u + at

So, 0 = u + (-8)(5)

So, u = 40 m/s

Now, s = ut + (1/2) at^2

So, s = 40(5) + (1/2)(-8)(5^2)

So, s = 200-100

So, s = 100 m

Thus, distance travelled is 100 m

Answer 2

Q.The brake applied to a car produce an acceleration of 8m per second square in opposite direction to the motion.If the car takes 5 sec to stop after the application of brake,Calculate the distance it travels during this time

ANSWER IN PHOTO