Find the Kinetic energy of combined mass.?
2020-10-07 12:56 pm
The combined mass of car and passengers travelling at 72km/hr is 1500kg. Find the kinetic energy of this combined mass.
回答 (1)
2020-10-07 1:00 pm
✔ 最佳答案
72 km/hr= (72 km/h) × (1000 m / 1 km) × (1 h / 3600 s)
= 20 m/s
Kinetic energy
= (1/2) m v²
= (1/2) (1500 kg) × (20 m/s)²
= 300000 J
= 300 kJ
收錄日期: 2021-04-24 08:24:25
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20201007045626AAHzz4P