Question

A car travelling at 35m/s West starts to decelerate steadily. it comes to complete stop in 25 seconds.
what is it's acceleration?​

Answer 1

Answer:

A car is travelling at 30 m/s. If its velocity increases to 50 m/s while accelerating at the rate of 2.5 m/s 2 find the time taken to reach that velocity.

Given Final velocity (v) = 50 m/s

Initial velocity (u) = 30 m/s

Acceleration (a) = 2.5 m/s

2

We know v = u + at

∴ 50 = 30 + 2.5 t

⇒ 50 - 30 = 2.5 t

⇒

2.5

20

= t or 8 = t

∴ Time taken to accelerate = 8 seconds

Answer 2

Answer:

-1.4m/s^2

Explanation:

v=u+at

now v=0

u=+35m/s

t=25s

0=35+a*25

=>a=-(35/25)

=>a=-1,4m/s^2