high skol math
2010-03-09 11:11 pm
The shock absorbers on a car are designed to dampen then vibration when the car goes over a bump. If a shock absorber reduces the vibration of the body of the car by 70% each time it passes the equilibrim line of the shock absorber, how far would the piston of the shock absorber travel in 3 bounces after the car hit a pothole 20 cm deep ?
回答 (2)
2010-03-10 4:06 am
✔ 最佳答案
The distance of the piston of the shock absorber travel in 3 bouncesafter the car hit a pothole 20 cm deep：
First bounce + Second bounce + Third bounce
20cm x 30% + 20cm x (30%)^2 + 20cm x (30%)^3
= 6 cm + 1.8 cm + 0.54 cm= 8.34 cm
參考: hkslot
2010-03-13 2:56 am
ok,20cm deep is70%
收錄日期: 2021-04-19 21:40:20
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100309000051KK00579