Linear air track 氣墊導軌
Answers:
答案:
m
1
u
1
= m
1
v
1
+ m
2
v
2
如 m
1
= m
2
, 又 v
1
=0; 則 m
1
u
1
= m
2
v
2
, 1/2 (m
1
u
1
2
) = 1/2 (m
2
v
2
2
)
碰撞前後的動能相等
此碰撞為彈性碰撞.
B
此碰撞為彈性碰撞.