Question

2.Для подьёма по наклонной плоскости груза массой 200 кг была приложена сила 250 Н . Высота наклонной плоскости 1.5 м длина 15 см.Определите КПД наклонной плоскости

Answer 1

n=Aполезное/A затраченное * 100%

Аполезная=mgh=200*10*1,5=3000дЖ

Aзатраченное=F*S

S это площадь прямоугольного треугольника=1/2 *1.5*0.15=0.1м^2

Aзатраченное=25дж

если посчитать то  получится больше 100% , значит ошибка в условии

помню я решал эту задачку и там была длина=15м

P.S точно знаю что решение такое

Answer 2

Calculation of Efficiency (КПД) of an Inclined Plane

To calculate the efficiency (КПД) of an inclined plane, we need to know the work input and the work output. The efficiency is defined as the ratio of the work output to the work input, expressed as a percentage.

In this case, we are given the force applied (250 N), the mass of the load (200 kg), the height of the inclined plane (1.5 m), and the length of the inclined plane (15 cm).

To calculate the work input, we can use the formula:

Work Input (W_in) = Force (F) × Distance (d)

The force applied is given as 250 N, and the distance is the length of the inclined plane, which is 15 cm (or 0.15 m).

Work Input (W_in) = 250 N × 0.15 m

To calculate the work output, we can use the formula:

Work Output (W_out) = Force (F) × Distance (d)

The force applied is still 250 N, and the distance is the height of the inclined plane, which is 1.5 m.

Work Output (W_out) = 250 N × 1.5 m

Now, we can calculate the efficiency using the formula:

Efficiency (КПД) = (Work Output / Work Input) × 100%

Substituting the values we calculated:

Efficiency (КПД) = (W_out / W_in) × 100%

Efficiency (КПД) = [(250 N × 1.5 m) / (250 N × 0.15 m)] × 100%

Simplifying the equation:

Efficiency (КПД) = (1.5 m / 0.15 m) × 100%

Efficiency (КПД) = 10 × 100%

Efficiency (КПД) = 100%

Therefore, the efficiency (КПД) of the inclined plane is 100%.

Please note that the calculations provided are based on the given information and assumptions. If there are any additional factors or details that need to be considered, please let me know.