An airship with 4 motors of 73.6 kW each moves in the air at a speed of 120 km / h.

An airship with 4 motors of 73.6 kW each moves in the air at a speed of 120 km / h. What is the resistance force in the air to the movement of the airship?

These tasks: n (the number of motors in the airship) = 4 motors; N1 (power of one motor) = 73.6 kW (73.6 * 10 ^ 3 W); V (constant airship speed) = 120 km / h (in SI system V = 33.3 m / s).

To determine the force of air resistance to the movement of the airship, we will use the formula: N = n * N1 = F * V, whence F = n * N1 / V.

Let’s calculate: F = 4 * 73.6 * 10 ^ 3 / 33.3 = 8832 N.

Answer: The force of air resistance to the movement of the airship is equal to 8832 N.