Welcome to Westonci.ca, your one-stop destination for finding answers to all your questions. Join our expert community now! Explore comprehensive solutions to your questions from knowledgeable professionals across various fields on our platform. Experience the convenience of finding accurate answers to your questions from knowledgeable experts on our platform.

A 20N box is pushed 10m up a ramp in 25 seconds. How much power is required? The work out to lift the same box is 75 J. Calculate the efficiency

Sagot :

To now the power we need to:

[tex]P=\frac{E}{t}=\frac{F\cdot d}{t}=\frac{20N\cdot10m}{25s}=8W[/tex]

The power is the ratio of energy over time, and the energy is the force applyed in the distance

For the efficiency

[tex]\eta=\frac{75J}{20N\cdot10m}=0.375[/tex]