Question

Груз массой 1,2 кг подняли по наклонной плоскости длинной 0,75 м на высоту 20 см . Его тянули с силой 2,4 H. Найдите КПД наклонной плоскости. ПОМОГИТЕ ПОЖАЛУЙСТА!СРОЧНО!

Answer 1

ДАНО : m=1,2 кг  L= 0,75м . h=0,2 м . F= 2,4 H

НАЙТИ : η

РЕШЕНИЕ : η= A полез / А затрач

работа полезная A= mgh = 1,2*10*0,2=2,4 Дж

работа затраченная  A= F L= 2,4*0,75 =1,8 Дж

ОЧЕНЬ СТРАННО ПОЛЕЗНАЯ БОЛЬШЕ ЗАТРАЧЕННОЙ, проверьте условие

Answer 2

Calculating the Efficiency of an Inclined Plane

To calculate the efficiency of an inclined plane, we can use the formula:

Efficiency (η) = (Useful output work / Total input work) x 100%

Where: - Useful output work is the work done in lifting the object to a certain height. - Total input work is the work done by the force applied to move the object up the inclined plane.

Given Data

- Mass of the object (m) = 1.2 kg - Length of the inclined plane (l) = 0.75 m - Height of the inclined plane (h) = 20 cm = 0.20 m - Force applied (F) = 2.4 N

Calculating Useful Output Work

The useful output work is the work done in lifting the object to a certain height. We can calculate it using the formula:

Useful output work = Force x Distance

Given that the force applied is 2.4 N and the height of the inclined plane is 0.20 m, we can calculate the useful output work.

Useful output work = 2.4 N x 0.20 m = 0.48 J

Calculating Total Input Work

The total input work is the work done by the force applied to move the object up the inclined plane. We can calculate it using the formula:

Total input work = Force x Distance

Given that the force applied is 2.4 N and the length of the inclined plane is 0.75 m, we can calculate the total input work.

Total input work = 2.4 N x 0.75 m = 1.8 J

Calculating Efficiency

Now that we have the values for the useful output work and the total input work, we can calculate the efficiency of the inclined plane using the formula:

Efficiency (η) = (Useful output work / Total input work) x 100%

Substituting the values: Efficiency (η) = (0.48 J / 1.8 J) x 100%

Efficiency (η) ≈ 26.67%

Conclusion

The efficiency of the inclined plane in this scenario is approximately 26.67%.

I hope this helps! If you have any further questions, feel free to ask.