An aircraft on its take-off run has a uniform acceleration of 3m/s^2.What velocity does the aircraft gain in 4s?

To find the velocity gained by the aircraft in 4 seconds, we can use the equation of motion:

v = u + at

Where:
v = final velocity
u = initial velocity
a = acceleration
t = time

In this case, the aircraft is on its take-off run, so its initial velocity (u) is 0 m/s since it starts from rest. The acceleration (a) is given as 3 m/s^2, and the time (t) is 4 seconds.

Plugging in these values into the equation, we have:

v = 0 + 3 * 4

v = 0 + 12

Therefore, the velocity gained by the aircraft in 4 seconds is 12 m/s.

V = at = 3 m/s^2 * 4 s = 12 m/s.