Question

Определите работу,совершаемую электровозом за 3 часа равномерного перемещения состава со средней скоростью 72 км\час при силе тяги 60 кН.

Answer 1

Работа(А)= F*S

S=t*V

S=3*72=216(в систему си можно не переводить, так как а обоих велечинах часы)

F=60 кН=60000Н

A=216*60000=12960000Дж

Answer 2

Calculating the Work Done by the Electric Locomotive

To calculate the work done by the electric locomotive, we can use the formula:

Work (W) = Force (F) × Distance (d)

Given: - Average speed of the train = 72 km/h - Time taken = 3 hours - Force of traction = 60 kN

First, let's convert the average speed from km/h to m/s: - 72 km/h = 20 m/s Next, we can calculate the distance covered by the train in 3 hours using the formula: Distance (d) = Speed (v) × Time (t) - Distance (d) = 20 m/s × 3 hours = 60 km

Now, we can calculate the work done by the electric locomotive using the formula: Work (W) = Force (F) × Distance (d) - Work (W) = 60 kN × 60 km = 3600 kN·km

Therefore, the work done by the electric locomotive over 3 hours of uniform motion at an average speed of 72 km/h with a force of traction of 60 kN is 3600 kN·km.