[問題] 幾題基礎物理
1.已知初速為零的自由落體,位移量值與時間平方成正比,若最後一秒的位移為總位移的
5/9,則全程費時多少秒?
2.承上題,第一秒與最後一秒位移的比為何?
3.動物跳躍時會將腿部彎曲然後伸直加速跳起。下表是袋鼠與跳蚤跳躍時的垂直高度,若
不計空氣阻力,則袋鼠躍起離地的瞬時速率約是跳蚤的多少倍?
__________________________________跳躍的垂直高度(公尺)___________________
| 袋鼠 | 2.5 |
_________________________________________________________________________
| 跳蚤 | 0.1 |
_________________________________________________________________________
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 114.37.86.192
推
03/27 17:46, , 1F
03/27 17:46, 1F
→
03/27 17:47, , 2F
03/27 17:47, 2F
推
03/27 17:49, , 3F
03/27 17:49, 3F
→
03/27 18:02, , 4F
03/27 18:02, 4F
推
03/27 18:20, , 5F
03/27 18:20, 5F
→
03/27 18:32, , 6F
03/27 18:32, 6F
推
03/27 18:44, , 7F
03/27 18:44, 7F
→
03/27 19:22, , 8F
03/27 19:22, 8F