Why is horsepower called brake horsepower?

Related questions

1. What is the KW value?
2. How many kW hours does a house use?
3. What unit is kW?
4. How many cc is a horsepower?
5. What does kW mean?
6. How many kilowatts does an average home use per day?
7. Why is a motor rated in kW?
8. How many units is 1kW?
9. How many amps are in a kW?
10. How do I calculate fridge power consumption?

Tags

1. #desired
2. #engine
3. #rotational
4. #crankshaft
5. #caused
6. #speed
7. #which
8. #outside
9. #drive
10. #brake
11. #horsepower
12. #gearbox
13. #train
14. #efficiency
15. #power
16. #measured
17. #refers
18. #before
19. #device
20. #losses