Question

M249 Cyclic Rate of Fire:

a) Approximately 450-600 rounds per minute
b) Approximately 750-900 rounds per minute
c) Approximately 1,000-1,200 rounds per minute
d) Approximately 1,500-1,800 rounds per minute

Answer 1

The muzzle velocity of the bullet is calculated using the formula for uniform acceleration and the given values for acceleration and time. The muzzle velocity is found to be approximately 502 meters per second.

Step-by-step explanation:

To calculate the muzzle velocity of a bullet, we can use the formula for constant acceleration, which is final velocity (v) = initial velocity (u) + acceleration (a) × time (t). Since the bullet starts from rest inside the gun, the initial velocity (u) is 0 m/s. Plugging the given acceleration and time into the formula, we get the muzzle velocity to be v = 0 + (6.20 × 10^5 m/s²) × (8.10 × 10^-4 s), which calculates to a muzzle velocity of approximately 502 m/s.