Yahoo Answers: Answers and Comments for Exercise physics need help? [Physics]
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From Nauman
enUS
Wed, 10 Jul 2019 16:07:49 +0000
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Yahoo Answers: Answers and Comments for Exercise physics need help? [Physics]
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https://answers.yahoo.com/question/index?qid=20190710160749AA9iSM0
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From NCS: Since the car is accelerating uniformly, event...
https://answers.yahoo.com/question/index?qid=20190710160749AA9iSM0
https://answers.yahoo.com/question/index?qid=20190710160749AA9iSM0
Wed, 10 Jul 2019 16:57:13 +0000
Since the car is accelerating uniformly, eventually it will reach 97.0 m/s and keep getting faster. At that point it will no longer be reachable by the bullet.
Let's say the bullet is in the air for time "t." If the bullet is just able to reach the car, impact occurs when they have travelled the same distance:
½a(t + 7.8s)² = 97.0m/s * t
I've already claimed that the car must be going 97.0 m/s:
v = 97.0 m/s = a*(t + 7.8s)
so
a = 97.0m/s / (t + 7.8s)
substitute for a in the first equation:
½ * (97.0m/s / (t + 7.8s)) * (t + 7.8s)² = 97.0m/s * t
½ * 97.0m/s * (t + 7.8s) = 97.0m/s * t
½ * (t + 7.8s) = t
t + 7.8s = 2t
7.8 s = t
and now you can solve for the acceleration:
a = 97.0m/s / (7.8 + 7.8)m/s
a = 6.22 m/s
Hope this helps!

From Anonymous: So what is your question jackass?
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https://answers.yahoo.com/question/index?qid=20190710160749AA9iSM0
Wed, 10 Jul 2019 16:08:23 +0000
So what is your question jackass?