A wagon weighs 1,000 newtons and is pulled by a horse at 5 m/s., what is the power of the horse?
回答 (2)
Power of the horse
= F v
= (1000 N) × (5 m/s)
= 5000 W
1 HORSEpower of course.
Even though the wagon has a weight of 1000N it is being pulled along the level on good wheels.
So it takes a force of only 10 N to pull it horizontally.
Giving a power output of 50 W
Now if you were claiming that it took a FORCE of 1000 N to move this cart then it would require a power of 1000 * 5 = 5000 W or about 7 horsepower.
What type of drugs did you feed this horse with?
收錄日期: 2021-04-18 16:02:28
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20170131060238AArZSQS
檢視 Wayback Machine 備份