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A 1.4-kg model rocket is launched vertically from rest
Chapter 13, Problem 13.10(choose chapter or problem)
A 1.4-kg model rocket is launched vertically from rest with a constant thrust of 25 N until the rocket reaches an altitude of 15 m and the thrust ends. Neglecting air resistance, determine (a) the speed of the rocket when the thrust ends, (b) the maximum height reached by the rocket, (c) the speed of the rocket when it returns to the ground.
Questions & Answers
QUESTION:
A 1.4-kg model rocket is launched vertically from rest with a constant thrust of 25 N until the rocket reaches an altitude of 15 m and the thrust ends. Neglecting air resistance, determine (a) the speed of the rocket when the thrust ends, (b) the maximum height reached by the rocket, (c) the speed of the rocket when it returns to the ground.
ANSWER:Step-by-step solution Step 1 of 6Calculate the weight of the model rocket.Here, mass of the rocket is and acceleration due to gravity isSubstitute for and for .(a)Calculate work done by the rocket to reach until 15 m altitude where the thrust ends.Here, is work done by the rocket to reach until 15 m altitude, is the altitudereached by the rocketSubstitute for the upward thrust for and for