advanced/notes 6.10
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Section 6.10Power
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Law of Conservation of Energy How do I calculate power?
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Power Power: the rate at which work is done
Unit: Watts
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Going Up Stairs Work of going up the stairs
Running
Walking
Power of going up the stairs Running
Walking
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Going Up Stairs A 60 kg jogger runs up a long flight
of stairs in 4.0 s. The vertical height of the stairs is 4.5 m. What is the joggers power output?
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BikingDUE TO MOUNTAINOUS COURSES, LIKE THE TOUR DE FRANCE, BIKERS USE POWERMETERS.
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Electricity Closer to home, power is the rate of electricity usage. We all have power
meters on the outside of our house
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Horsepower Frequently hear about horsepower
and car engines
Actually started as a measure of how much a horse could actually do
1 horsepower = 1hp = 550 = 746 Watts
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Cars The work engines do is overcoming
friction, air resistance, and gravity.
Acceleration is also work
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Homework Page 164
# 58 – 66, skip # 64