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A box weighing 100 n is pushed up an incline plane that is 5 m long. It takes a force of 75 n to push it to the top, which has a height of 3m. Find the efficiency

Respuesta :

MathPhys

Answer:

0.8

Explanation:

Work = force × distance

W = Fd

W = 75 N × 5 m

W = 375 J

Potential energy = weight × height

PE = mgh

PE = 100 N × 3 m

PE = 300 J

Efficiency = energy out / energy in

e = 300 J / 375 J

e = 0.8

The efficiency is 0.8, or 80%.

The efficiency will be 0.8 or 80%.

What is efficiency?

Efficiency can be expressed as a ratio by using the following formula: Output ÷ Input.

  • Here the efficiency is in the terms of energy
  • So the efficiency will be energy out/ energy in
  • Energy out = potential energy of the box
  • Energy in = work done

So , Work = force × distance

             W = Fd

             W = 75 N × 5 m

            W = 375 Joule

And , Potential energy = weight × height

                                 PE = mgh

                                 PE = 100 N × 3 m

                                 PE = 300 Joule

Therefore, Efficiency = energy out / energy in

                                e = 300 J / 375 J

                               e = 0.8

Thus, the efficiency will be 0.8 or 80%.

Learn to calculate efficiency here -

https://brainly.com/question/23693991

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