Advanced physics?
2021-01-11 4:52 pm
Suppose you pull a sled with a rope that makes an angle of 30.0° to the horizontal. How much work do you do if you pull with 25.0 N of force and the sled moves 25.0 m?
回答 (2)
2021-01-11 5:05 pm
✔ 最佳答案
Work done= F s cosθ
= 25.0 × 25.0 × cos(30.0°)
= 541 J
2021-01-11 8:59 pm
work W = F*cos 30°*d = 25^2*0.866 = 541 joule
收錄日期: 2021-04-24 09:51:17
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20210111085229AAaqWK7