Question

Электрокар тянет прицеп со скоростью 3 метра/секунду, преодолевая сопротивление 400 Ньютон. Определите работу, совершаемою мотором электрокара за 8 мин

Answer 1

8мин=480с

A=FS=Fvt=400*3*480=576000Дж= 576 кДж

Answer 2

Calculation of Work Done by the Electric Car Motor

To determine the work done by the motor of the electric car, we need to calculate the product of the force applied and the distance traveled. The force applied is given as 400 Newtons, and the distance traveled is the product of the speed and time.

Given: - Speed of the electric car: 3 meters/second - Resistance overcome by the electric car: 400 Newtons - Time: 8 minutes

First, let's convert the time from minutes to seconds: - 8 minutes = 8 * 60 = 480 seconds

Next, we can calculate the distance traveled by the electric car: - Distance = Speed * Time = 3 m/s * 480 s = 1440 meters

Now, we can calculate the work done by the motor using the formula: - Work = Force * Distance

Substituting the values: - Work = 400 N * 1440 m = 576,000 Joules

Therefore, the work done by the motor of the electric car over 8 minutes is 576,000 Joules.