advanced/notes 6.10
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Section 6.10Power
Law of Conservation of Energy How do I calculate power?
Power Power: the rate at which work is done
Unit: Watts
Going Up Stairs Work of going up the stairs
Running
Walking
Power of going up the stairs Running
Walking
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?
BikingDUE TO MOUNTAINOUS COURSES, LIKE THE TOUR DE FRANCE, BIKERS USE POWERMETERS.
Electricity Closer to home, power is the rate of electricity usage. We all have power
meters on the outside of our house
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
Cars The work engines do is overcoming
friction, air resistance, and gravity.
Acceleration is also work
Homework Page 164
# 58 – 66, skip # 64