Question

If a body starts from rest the time in which it covers a particular displacement with uniform acceleration is

Answer 1

Here S is displacement during t time .

∴ displacement in last 2 sec = distance travelled in n sec- distance travelled in (n -2) sec

= = 1/2 an² - 1/2a(n -2)²

= 1/2 a (n² - n² + 4n - 4)

= a (2n -2)

So, displacement in last 2 sec = a(2n - 2)

A/C to question,

Final velocity = v

Time = t

Acceleration = a

Then, use formula,

v = u + at

initial rest so, u = 0

v = a × n ⇒a = v/n

Now, displacement in last 2 sec = v/n(2n - 2) = 2v - 2v/n

Answer 2

Answer:

Intial velocity U is = 0