To find the velocity of the body at a given time t, we can use the equation:
v = u + at
Where: v is the final velocity, u is the initial velocity (which is 0 in this case since the body starts from rest), a is the acceleration, and t is the time.
Given: a = 7t m/s² t = 2 s
Plugging in the values into the equation, we have:
v = 0 + 7(2)
Simplifying:
v = 0 + 14
Therefore, the velocity of the body at t = 2 seconds is 14 m/s.