The wing of a reconnaissance aircraft flying at a height is pierced by a bullet at a speed of 800 m / s

The wing of a reconnaissance aircraft flying at a height is pierced by a bullet at a speed of 800 m / s, the wing is hollow, thickness is 30 cm, the bullet is still shifted by 9 cm. Find the speed of the aircraft.

Task data: V1 (bullet flight speed) = 800 m / s; S1 (the thickness of the hollow wing of the aircraft, the distance traveled by the bullet) = 30 cm (in SI S = 0.3 m); S2 (bullet displacement, distance traveled by the aircraft) = 9 cm (in SI S2 = 0.09 m).

The speed of the reconnaissance aircraft can be expressed from the ratio: S1 / V1 = t (time) = S2 / V2, whence V2 = S2 * V1 / S1.

Let’s calculate: V2 = 0.09 * 800 / 0.3 = 240 m / s.

Answer: The speed of the reconnaissance aircraft is 240 m / s.