1. Power, Horsepower and Watts

2. Power What is power? Power is defined as the rate of doing work.
P= Work/time
Units: lbft/sec or Joules/sec
How many repetitions can the weightlifter complete in 1 minute?

3. Horsepower What is Horsepower?
Definition: The common unit of measurement of an engine's power.
One horsepower equals 550 foot-pounds per second (the power needed to lift 550 pounds one foot off the ground in one second or one pound 550 feet up in the same time)

4. Horsepower
550 ft ·lb/sec

5. Horsepower formula

6. Watts and Power What is a watt?
Definition: A scientific unit of electrical power commonly used to describe the rate of energy consumption of an electrical appliance.
 One Watt is the power equal to one joule of energy per second.
Watts = Work (Joule)/second

7. Helpful conversions 1 Joule = 1 Nm 1000 watts = 1 kilowatt (kW)
1 horsepower (hp) = .75 kW or 750 watts