Question
Asked Dec 16, 2019
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A model rocket is launched straight upward with an initial
speed of 50.0 m/s. It accelerates with a constant upward
acceleration of 2.00 m/s2 until its engines stop at an altitude
of 150. m. (a) What can you say about the motion of the
rocket after its engines stop? (b) What is the maximum height
reached by the rocket? (c) How long after liftoff does the
rocket reach its maximum height? (d) How long is the rocket
in the air?

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Expert Answer

Step 1

(a) write the expression for final velocity when the engine stops

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1? = u? + 2as

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Step 2

Substitute the values

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=(50.0 m/s)° + 2(2.00 m/s²)(150 m) v = 55.67 m/s

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Step 3

 (b) write the expression for maxi...

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(r^)* = r² + 2a'(s' – s) (r^)³. (1^)² – r² s' = 2a

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Physics

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