The trolleybus moves evenly at a speed of 10 m / s. Find the thrust force of its engine

The trolleybus moves evenly at a speed of 10 m / s. Find the thrust force of its engine, if the efficiency is 80%, the voltage in the network is 550V and a current of 50A flows through the winding.

Initial data: V (speed of uniform movement of the trolleybus) = 10 m / s; η (efficiency of the trolleybus engine) = 80% (0.8); U (mains voltage) = 550 V; I (current in the trolleybus motor winding) = 50 A.

The thrust force of the trolleybus engine can be determined from the formula for calculating the efficiency: η = N1 / N2 = F * V / (U * I), whence F = U * I * η / V.

Let’s make the calculation: F = 550 * 50 * 0.8 / 10 = 2200 N (2.2 kN).

Answer: The thrust of the trolleybus engine is 2.2 kN.