Question

Висота похилої дороги 5 м, а довжини - 50 м. Щоб підняти по цій площині машину масою 1000 кг, потрібно прикласти силу 2500 Н. Визначте ККД похилої дороги. Момент сили визначають за формулою: F*І Nt S*F Який із простих механізмів є важелем? клин гвинт блок СРОЧНОООО!!!!!!!!!!!!!!

Answer 1

Ответ:

Объяснение:

1) kkд = (m g h)/(F L) = (1000 * 10 * 5) / (2500 * 50) = 50000/125000=0,4

2) Момент сили = F*l

3) Блок

Answer 2

Calculation of Efficiency (ККД) of an Inclined Road

To determine the efficiency (ККД) of an inclined road, we need to calculate the work done by the force applied to lift the car and compare it to the work done against gravity.

The work done by a force is given by the formula: work = force × distance.

In this case, the force applied to lift the car is 2500 N, and the distance is the length of the inclined road, which is 50 m.

The work done against gravity is given by the formula: work = weight × height, where weight is the mass of the car multiplied by the acceleration due to gravity (9.8 m/s^2) and height is the height of the inclined road, which is 5 m.

To calculate the efficiency (ККД), we can use the formula: efficiency = work done by force / work done against gravity.

Let's calculate the efficiency (ККД) of the inclined road:

1. Calculate the work done by the force applied to lift the car: - Force = 2500 N - Distance = 50 m - Work = Force × Distance = 2500 N × 50 m = 125000 J

2. Calculate the work done against gravity: - Mass of the car = 1000 kg - Acceleration due to gravity = 9.8 m/s^2 - Height = 5 m - Weight = Mass × Acceleration due to gravity = 1000 kg × 9.8 m/s^2 = 9800 N - Work = Weight × Height = 9800 N × 5 m = 49000 J

3. Calculate the efficiency (ККД): - Efficiency = Work done by force / Work done against gravity = 125000 J / 49000 J ≈ 2.55

Therefore, the efficiency (ККД) of the inclined road is approximately 2.55.

Simple Machines: Lever

A lever is one of the simple machines. It consists of a rigid bar that rotates around a fixed point called a fulcrum. Levers are used to amplify or redirect forces. They can be found in various everyday objects, such as seesaws, scissors, and crowbars.

I hope this helps! Let me know if you have any further questions.