Question

Для подъема по наклонной плоскости груза массой 200кг была приложена сила 250Н. Высота наклонной плоскости 1,5м, длина 15м. Опредилите КПД этой наклонной плоскости. помогите пожалуста

Answer 1

Работа совершеннейшая подённой силой A=S*F = 15м*250Н = 3750 ЖД 
Потенциальная энергия приобретённая телом E= mgh = 200кг*10м/с^2*1.5м= 3000 Жд 
кпд =100%* A/E=100% *3000/3750 = 80%

Answer 2

Calculation of Efficiency (КПД) for Inclined Plane

To calculate the efficiency (КПД) of the inclined plane, we need to determine the work input and work output.

Given information: - Mass of the load (груза): 200 kg - Force applied (приложена сила): 250 N - Height of the inclined plane (высота наклонной плоскости): 1.5 m - Length of the inclined plane (длина): 15 m

Step 1: Calculate the work input (входная работа): The work input is the product of the force applied and the distance over which it is applied. In this case, the distance is the length of the inclined plane.

Work input (входная работа) = Force applied (приложена сила) × Distance (длина)

Work input = 250 N × 15 m

Step 2: Calculate the work output (выходная работа): The work output is the product of the weight of the load and the height of the inclined plane.

Work output (выходная работа) = Weight of the load × Height of the inclined plane

Weight of the load = mass × acceleration due to gravity

Weight of the load = 200 kg × 9.8 m/s^2

Work output = (200 kg × 9.8 m/s^2) × 1.5 m

Step 3: Calculate the efficiency (КПД): Efficiency (КПД) is the ratio of the work output to the work input, expressed as a percentage.

Efficiency (КПД) = (Work output / Work input) × 100

Efficiency = (Work output / Work input) × 100

Now, let's calculate the values:

Work input = 250 N × 15 m = 3750 JWork output = (200 kg × 9.8 m/s^2) × 1.5 m = 2940 J Efficiency = (2940 J / 3750 J) × 100

Therefore, the efficiency (КПД) of this inclined plane is approximately 78.4%.

Please note that the efficiency calculated here assumes that there are no other significant energy losses, such as friction or air resistance.