Question

Срочно !!! Поїзд масою 6×10⁵ кг рівномірно підіймається на гору. Підйом гори 5 м на 1 м шляху. Сила тертя 10⁴ Н. Швидкість поїзда 72 км/год. Визначте потужність поїзда​

Answer 1

Ответ:Для початку, визначимо силу тяжіння (Fтяж):

Fтяж = m * g

Де:

m - маса поїзда (6×10⁵ кг)

g - прискорення вільного падіння (9,8 м/с²)

Fтяж = 6×10⁵ кг * 9,8 м/с² = 5,88×10⁶ Н

Тепер визначимо силу руху (Fрух):

Fрух =  Fтяж + Fтертя

Fрух = 5,88×10⁶ Н + 10⁴ Н = 5,89×10⁶ Н

Потужність (P) визначається за формулою:

P = Fрух * V

В даному випадку швидкість (V) виражена в кілометрах на годину, тому треба перевести в метри на секунду. За формулою:

1 км/год = 1000 м/3600 с = 10/36 м/с

V = 72 км/год * 10/36 м/с = 20 м/с

P = 5,89×10⁶ Н * 20 м/с = 1,178×10⁸ Вт

Отже, потужність поїзда становить 1,178×10⁸ Вт.

Объяснение:

Answer 2

Відповідь:260кВт

Пояснення:    N=F*v

F=ma+Fтер

F=1?3*10)4

N=260

Answer 3

Calculation of Power

To determine the power of the train, we need to calculate the work done by the train in lifting its mass against gravity and overcoming friction. The power is defined as the rate at which work is done, which can be calculated using the formula:

Power = Work / Time

To calculate the work done by the train, we need to consider two components: the work done against gravity and the work done against friction.

Work Done Against Gravity

The work done against gravity can be calculated using the formula:

Work = Force × Distance

In this case, the force is equal to the weight of the train, which can be calculated using the formula:

Force = Mass × Acceleration due to gravity

The acceleration due to gravity is approximately 9.8 m/s².

Given that the mass of the train is 6 × 10⁵ kg and the train is lifted 5 m, we can calculate the work done against gravity.

Work Done Against Friction

The work done against friction can be calculated using the formula:

Work = Force × Distance

In this case, the force is equal to the frictional force, which is given as 10⁴ N. The distance is equal to the distance traveled by the train, which can be calculated using the formula:

Distance = Speed × Time

Given that the speed of the train is 72 km/h, we need to convert it to m/s to calculate the distance.

Calculation

Let's calculate the power of the train step by step:

1. Calculate the force due to gravity: - Force = Mass × Acceleration due to gravity - Force = 6 × 10⁵ kg × 9.8 m/s²

2. Calculate the work done against gravity: - Work = Force × Distance - Work = (6 × 10⁵ kg × 9.8 m/s²) × 5 m

3. Convert the speed from km/h to m/s: - Speed = 72 km/h × (1000 m/1 km) × (1 h/3600 s)

4. Calculate the distance traveled by the train: - Distance = Speed × Time - Distance = (72 km/h × (1000 m/1 km) × (1 h/3600 s)) × 1 m

5. Calculate the work done against friction: - Work = Force × Distance - Work = 10⁴ N × (72 km/h × (1000 m/1 km) × (1 h/3600 s)) × 1 m

6. Calculate the total work done by the train: - Total Work = Work against gravity + Work against friction

7. Calculate the power of the train: - Power = Total Work / Time

Let's calculate the power using the given values.