Question

Троллейбус массой 11 т движется со скоростью 36 км ч найти силу тока в обложки двигателя если напряжение 550 Вт КПД 80% коффициэнт сопратевления движения 0,02

Answer 1

Дано:m=11т=11000кгv=36км/ч=10м/сI=40AU=550Bu=?Решение:P1=P2Fтяги=Fтрения=mguP1=Fv=mguvP2=UIu=UI/mgvu=550*40/11000*10*10=0,02Ответ:0,02

Answer 2

Calculating the Current in the Trolleybus Motor

To calculate the current in the trolleybus motor, we can use the formula:

Current (I) = Power (P) / (Efficiency (η) * Voltage (V))

Given: - Power (P) = 550 W - Efficiency (η) = 80% or 0.80 - Voltage (V) = 550 V

First, we need to calculate the power consumed by the trolleybus motor. The power can be calculated using the formula:

Power (P) = Force (F) * Velocity (v)

The force can be calculated using the formula:

Force (F) = Mass (m) * Acceleration (a)

Given: - Mass (m) = 11 t = 11000 kg - Velocity (v) = 36 km/h = 10 m/s - Coefficient of resistance (k) = 0.02

The acceleration can be calculated using the formula:

Acceleration (a) = (Coefficient of resistance (k) * Velocity (v)^2) / 2

Let's calculate the acceleration first.

Calculating Acceleration

The acceleration (a) can be calculated using the given coefficient of resistance (k) and velocity (v).

Acceleration (a) = (0.02 * 10^2) / 2

Acceleration (a) = 1 m/s^2

Calculating Force

Now, we can calculate the force (F) using the mass (m) and acceleration (a).

Force (F) = 11000 kg * 1 m/s^2

Force (F) = 11000 N

Calculating Power

Next, we can calculate the power (P) consumed by the trolleybus motor using the force (F) and velocity (v).

Power (P) = 11000 N * 10 m/s

Power (P) = 110000 W

Calculating Current

Now that we have the power (P), efficiency (η), and voltage (V), we can calculate the current (I) in the trolleybus motor.

Current (I) = 110000 W / (0.80 * 550 V)

Current (I) ≈ 200 A

So, the current in the trolleybus motor is approximately 200 A.