Question

If a body is moving with uniform acceleration 3 m/s2
starting from rest find its velocity at
time, t = 2s?

Answer 1

Answer:

Correct option is

D

6

Given Final Velocity v=0, deceleration a=4ms

−2

and deceleration time t=3s,

Let u be the velocity before the deceleration is started.

Using v=u+at ⇒0=u−4×3 ⇒u=12,ms

−1

,

Now , During acceleration, Initial velocity u

1

=0, time t=2s, Final velocity u=12ms

−1

,

Let acceleration is a.

Using v=u+at ⇒12=0+a×2 ⇒a=6ms

−2

Answer 2

Answer:

Now, we know that √2 is an irrational number, hence 4√2 is also an irrational number. Therefore, √32 is an irrational number.