Question

a boy was running race at a speed of 5 metre per second after crossing finishing line he retards and stops in 5 second find the retardation​

Answer 1

Answer:

-1 m/s^2

Explanation:

According to the given question,

v = final velocity = 0 m/s

u = initial velocity = 5 m/s

t = time = 5 sec

a = acceleration and -a = deceleration

And we are asked to find the deceleration or the retardation of the car.

We know,

• v = u+at

Putting the values we get,

• 0 = 5+5a

• 5a=-5

• a = - 5/5

• a = -1 m/s^2

Thus the declaration is equal to -1 m/s^2 from the given condition.