Question

a bullet leaves the barrel of a gun with the speed of 320m/s. the barrel is 80.0cm long. Assuming uniform acceleration, determine

a)the time it took

b)the acceleration of the bullet

Answer 1

(a) Time = (barrel length)/(average speed)
= 2*(barrel length)/(exit speed) = 2L/V

(b) Length = (a/2) T^2
Use T from part A and solve for a

a = 2 L/T^2 = 2L*V^2/(4L^2)
= V^2/(2L)