Question

Электрокар тянет тележку со скоростью 3 м\с преодалевая силу сопротивления 400Н. Какую работу выполняет двигатель электрокара за 8 мин.плиз с решением

Answer 1

расстояние l равно 3 *(8*60) равно 1440 м
А(работа) равна 1440 м * 400 Н равна 576000 дж  или 576 кДж

Answer 2

Calculation of Work Done by the Electric Car's Motor

To calculate the work done by the electric car's motor, we can use the formula:

Work = Force × Distance

In this case, the force is the resistance force of 400 N, and the distance is the product of the car's speed (3 m/s) and the time (8 minutes). However, we need to convert the time from minutes to seconds to ensure consistent units.

Let's calculate the work done by the electric car's motor step by step:

1. Convert the time from minutes to seconds: - 8 minutes = 8 × 60 seconds = 480 seconds

2. Calculate the distance traveled by the car: - Distance = Speed × Time = 3 m/s × 480 s = 1440 meters

3. Calculate the work done by the motor: - Work = Force × Distance = 400 N × 1440 m = 576,000 Joules

Therefore, the electric car's motor performs 576,000 Joules of work in 8 minutes while overcoming a resistance force of 400 N.

Please let me know if you need any further assistance!