Power is how fast work is done or energy is used. You can think of it like this:
Power = Work Done ÷ Time
In school, we often talk about power using these common units:
Watts (W): This is the main unit we use. One watt is the same as using one joule of energy every second. So, 1 W = 1 joule/second (1 J/s).
Kilowatts (kW): This is used for bigger amounts of power. One kilowatt equals 1,000 watts. So, 1 kW = 1,000 W.
Horsepower (hp): This unit is usually found when talking about car engines. One horsepower is about 746 watts.
For example, a regular light bulb might use 60 watts, while a car engine can use 100 horsepower.
Knowing these units helps us see how efficient different machines or devices are when they use energy!
Power is how fast work is done or energy is used. You can think of it like this:
Power = Work Done ÷ Time
In school, we often talk about power using these common units:
Watts (W): This is the main unit we use. One watt is the same as using one joule of energy every second. So, 1 W = 1 joule/second (1 J/s).
Kilowatts (kW): This is used for bigger amounts of power. One kilowatt equals 1,000 watts. So, 1 kW = 1,000 W.
Horsepower (hp): This unit is usually found when talking about car engines. One horsepower is about 746 watts.
For example, a regular light bulb might use 60 watts, while a car engine can use 100 horsepower.
Knowing these units helps us see how efficient different machines or devices are when they use energy!