physics
2009-11-04 11:18 pm
a truck of mass 100kg is to loaded onto a ship using a crane that exerts a force of 31 kN over a displacement of 2 m. find the upward speed of truck after its displacement.
回答 (1)
2009-11-05 12:12 am
✔ 最佳答案
Assume no energy loss,Input energy=output energy
Fs=KE
31*1000*2=100*vv/2
v=35.2m/s
參考: myself
收錄日期: 2021-04-25 23:16:37
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091104000051KK00605