Spring Clamp Set
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Spring Clamp Set
another physics problem....?
A 11.1 kg weather rocket generates a thrust of 230 N . The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 510 N/m , is anchored to the ground.
Part A
Initially, before the engine is ignited, the rocket sits at rest on top of the spring. How much is the spring compressed?
ANSWER: =
21.3 cm
Part B
After the engine is ignited, what is the rocket's speed when the spring has stretched 36.0 cm ?
ANSWER: =
2.94 cm
Once again i have the answers, I just dont really know how to set it up...
my book comes with answers but doesnt show how to actually do it :-/
For the first bit use F=-kx
where F is the force
-k is the constant
and x is the distance of compression
Therefore if F/-k=x, and the force due to gravity is mg then mg/-k=x
(10*11.1)/-510=x
x=0.217m
that is 21 cm..
unfortunatly your answer for Part B must be incorrect becasue Velocity is a measure of speed and therefore in a unit of distance over time taken.
2.94 cm is an not a unit for velocity
10*11.1
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