Question

4. An automobile travelling with an initial
Velocity Of 30m/sec. comes to rest after
travelling a distance of 90m/sec Assuming the
retardation to be uniform find its value.
What time does it takes to cover the distance?​

Answer 1

Answer:

8 seconds

Explanation:

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