figure link：http://img255.imageshack.us/img255/6991/69374054.png
A car of mass m travels into a region where the track is an of a vertical circle of
radius r. At the bottom of this arc, the car travels at speed v .At this position the
vertical force exerted upwards by the track on the car is?
最好畫free body diagrame解釋
AL phy
2010-09-09 4:42 am
回答 (1)
2010-09-09 5:16 pm
✔ 最佳答案
In the vertical direction, there are only two forces, the weight of the car and the normal reaction.The equation describing the morion at this location is:
R - mg = mv^2/r
where R is the normal reaction acting on the car
g is the acceleration due to gravity
Hence, R = mg + mv^2/r = m(g + v^2/r)
收錄日期: 2021-04-19 23:10:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100908000051KK01274