The bullet flew out of the gun at a speed of 40 m / s. To what height did the bullet rise and what is its rise time?

Data: V0 (muzzle velocity of a rifle bullet) = 40 m / s; the velocity vector of a given bullet will be considered directed vertically upward.

Constants: g (acceleration due to gravity) ≈ 10 m / s2.

1) Height of rifle bullet lift: H = V0 ^ 2 / 2g = 40 ^ 2 / (2 * 10) = 80 m.

2) Rise time: t = V0 / g = 40/10 = 4 s.

Answer: The rifle bullet rose to a height of 80 m in 4 seconds.