Question

An electron starting from rest has an acceleration which increases linearly with time in one direction as a=2t+3 (where a is in m/S2 and t is time in second). The change in velocity of the electron in first 2 second will be

6m/S2
12m/S2
8m/S2
10m/S2
​

Answer 1

Answer:

10 m/s

Explanation:

integrate the acceralation with limit 0 to 2

Answer 2

Answer:

Explanation:

a=2t+3

dv/dt=2t+3

dv=(2t+3)dt

intregrate

v=[t^2+3t] 0to2

=4+6

=10m/s