7=0 Engine ignites. 7=28 Engine shuts down. Maximum height; parachute deploys. Note: Figures not drawn to scale. Rocket descends. Ground A model rocket of mass 0.5 kg is launched vertically with an engine that is ignited at time t = 0, as shown to the left. The engine provides a constant force of 15 N upward for 2.0 s. After 2 seconds, the engine shuts off and the rocket coasts upward and reaches a maximum height. Air resistance is negligible during this time. Upon reaching its maximum height the rocket deploys a parachute. The parachute's large size and shape means air resistance is no longer negligible; there is now an upward air resistance force. The rocket eventually speeds up a downward terminal velocity. Terminal velocity is the term for when a falling object reaches a constant downward velocity; something falling at terminal velocity is no longer speeding up.
7=0 Engine ignites. 7=28 Engine shuts down. Maximum height; parachute deploys. Note: Figures not drawn to scale. Rocket descends. Ground A model rocket of mass 0.5 kg is launched vertically with an engine that is ignited at time t = 0, as shown to the left. The engine provides a constant force of 15 N upward for 2.0 s. After 2 seconds, the engine shuts off and the rocket coasts upward and reaches a maximum height. Air resistance is negligible during this time. Upon reaching its maximum height the rocket deploys a parachute. The parachute's large size and shape means air resistance is no longer negligible; there is now an upward air resistance force. The rocket eventually speeds up a downward terminal velocity. Terminal velocity is the term for when a falling object reaches a constant downward velocity; something falling at terminal velocity is no longer speeding up.
Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter9: Momentum And Its Conservation
Section9.2: Conservation Of Momentum
Problem 23PP
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