A bullet in a gun is accelerated from the firing chamber to the end of the barrel at an average rate of 6.20*105m/s2 for 8.10*10-4s. What is its muzzle velocity (that is, its final velocity) ?

502.2 m/s

Explanation:

initial velocity, u = 0 m/s

Let the final speed is v.

acceleration, a = 6.2 x 10^5 m/s^2

time taken, t = 8.10 x 10^-4 s

The muzzle speed is the final speed.

Use first equation of motion

v = u + a t

v = 0 + 6.2 x 10^5 x 8.10 x 10^-4

v = 502.2 m/s

Thus, the muzzle speed of the bullet is 502.2 m/s.