Question

Коефіцієнт Корисної Дії похолої площини 70% щоб підняти вантаж масою 14 кг необхідно прикласти силу 50Н якою є довжина похилої площини якщо її висота 30 см ??????????????????? будь ласка мені потрібно на сьогодні ппппплиииииииизззззззззззззз

Answer 1

При подъеме на высоту h выполняется полезная работа А =mgh
при этом затрачивается энергия W = F*S
известно что КПД = А/W *100% =mgh/(F*S) *100%
КПД = mgh/(F*S) *100%
S = mgh/(F*КПД) *100% = 14*10*0,3/(50*70)*100 м = 1,2 м - это ответ

Answer 2

Calculation of the Length of the Inclined Plane

To determine the length of the inclined plane, we can use the formula for the mechanical advantage of an inclined plane, which is given by:

Mechanical Advantage (MA) = Length of Inclined Plane (L) / Height of Inclined Plane (H)

Given that the coefficient of useful action (also known as the mechanical efficiency) of the inclined plane is 70%, we can express this as:

Coefficient of Useful Action (CUA) = Mechanical Advantage (MA) / Ideal Mechanical Advantage (IMA)

The ideal mechanical advantage of an inclined plane is given by:

Ideal Mechanical Advantage (IMA) = Length of Inclined Plane (L) / Height of Inclined Plane (H)

By rearranging the equation for the coefficient of useful action, we can solve for the length of the inclined plane:

Length of Inclined Plane (L) = Coefficient of Useful Action (CUA) * Height of Inclined Plane (H)

Now, let's substitute the given values into the equation to find the length of the inclined plane.

Given: - Coefficient of Useful Action (CUA) = 70% - Height of Inclined Plane (H) = 30 cm

Using the formula, we can calculate the length of the inclined plane:

Length of Inclined Plane (L) = 0.7 * 30 cm

Calculating the result:

Length of Inclined Plane (L) = 21 cm

Therefore, the length of the inclined plane is 21 cm.

Please note that the provided search results did not directly answer the question. The calculation was performed based on the given information and the principles of inclined planes.