Question

if a body chane velocity from 20m/sec in 30m/sec find velocity​

Answer 1

Answer:

According to the given problem,

A body changes its velocity from 20m/s to 30 m/s in 2 seconds.

Let A & D denote respectively (the acceleration) & (distance covered).

We have the following kinematic relations,

30 = 20 + 2*A ….. (1a) [v = u + a*t]

D = 20*2 + (1/2)*A*2^2 ….. (1b) [s = u*t + (1/2)*a*t^2]

Answer 2

Answer:

Average velocity = 25 m/ sec

Explanation:

Average velocity=Initial velocity+Final Velocity/2

= 20 m/s + 30 m/s /2

= 25 m/s