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Home Q & A Board Science-Related Homework Help Physics
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irina irina
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Posts: 919
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11 years ago
A 1000 kg weather rocket is launched straight up. The rocket motor provides a constant acceleration for 20 s, then the motor stops. The rocket altitude 24 s after launch is 5000 m. You can ignore any effects of air resistance.
(a) What was the rocket's acceleration during the first 20 s?
(b) What is the rocket's speed as it passes through a cloud 5000 m above the ground?
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rnh
wrote...
#1
11 years ago
d = vi * t + 1/2 * a * t^2
5000 m = 0 + 24^2 /2 * a
5000 = 288 * a
a = 12.89 m/s/s
Answer accepted by topic starter
lesliepenglesliepeng
wrote...
#2
Posts: 22
Rep: 0 0
11 years ago
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