Question

A particle moves with a uniform velocity of 50 m/s for 20min. what is the velocity of particle at t=2min?

Answer 1

As particle is moving with uniform velocity with 50 m/s i.e. particle is moving with constant velocity of 50 m/s for 20 min.
So velocity of the particle at t = 2 min is same as 50 m/s.

Answer 2

Answer:

The velocity remains the same i.e.50m/s.

Explanation:

We will use first equation of motion to solve this question i.e.

$v=u+at$      (1)

Where,

v=final velocity with which the body is moving

u=initial velocity with which the body is moving

a=acceleration of the body

t=time required for changes

From the question, we have that the particle is moving  with a uniform velocity of 50 m/s for 20min. Since, the velocity is uniform the acceleration will be zero.i.e.

$a=0$     (2)

By putting a=0 in equation (1) we get;

$v=u+0\times t$

$v=u$  (3)

∴Initial velocity will be equal to final velocity.

Hence, the velocity remains the same i.e.50m/s.