collision , toy car B accelerates at 1 m/s^2 for 0.5s on average. toy cars A and B are of mass 3 kg and 1 kg respectively.
更新1:
find the velocity of toy car A after the collision?
功課問題ahdbjashbdashbdh
2010-01-03 10:28 pm
toy car B is stationary and toy car A is pushed to hit it at 3m/s . During the
collision , toy car B accelerates at 1 m/s^2 for 0.5s on average. toy cars A and B are of mass 3 kg and 1 kg respectively.
collision , toy car B accelerates at 1 m/s^2 for 0.5s on average. toy cars A and B are of mass 3 kg and 1 kg respectively.
回答 (2)
2010-01-03 11:15 pm
✔ 最佳答案
Apply equation of motion on car B: v = u + atwith u = 0 m/s, a = 1 m/s2, t = 0.5s, v = ?
v = 1 x 0.5 m/s = 0.5 m/s
Use conservation of momentum
3 x 3 = 3V(a) + 1 x 0.5
where V(a) is the velocity of car A after the collision
V(a) = [9 - 0.5]/3 m/s = 2.8 m/s
2010-01-03 10:34 pm
Car A :10000000 m/s^2
Car B::2000000 m/s^2
Car B::2000000 m/s^2
收錄日期: 2021-04-29 17:38:38
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