A small rocket with mass 20.0 kg is moving in free falltoward the earth. Air resistance can be neglected. When the rocket is80.0 m above the surface of the earth, it is moving downward with aspeed of 30.0 m/s. At that instant the rocket engines start to fire and producea constant upward force F on the rocket. Assume the change in therocket’s mass is negligible. What is the value of F if the rocket’s speedbecomes zero just as it reaches the surface of the earth, for a soft landing?(Hint: The net force on the rocket is the combination of the upwardforce F from the engines and the downward weight of the rocket.)
A small rocket with mass 20.0 kg is moving in free falltoward the earth. Air resistance can be neglected. When the rocket is80.0 m above the surface of the earth, it is moving downward with aspeed of 30.0 m/s. At that instant the rocket engines start to fire and producea constant upward force F on the rocket. Assume the change in therocket’s mass is negligible. What is the value of F if the rocket’s speedbecomes zero just as it reaches the surface of the earth, for a soft landing?(Hint: The net force on the rocket is the combination of the upwardforce F from the engines and the downward weight of the rocket.)
Physics for Scientists and Engineers
10th Edition
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter5: The Laws Of Motion
Section: Chapter Questions
Problem 5P: Two forces, F1=(6.00i4.00j)N and F2=(3.00i+7.00j)N, act on a particle of mass 2.00 kg that is...
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5.A small rocket with mass 20.0 kg is moving in free falltoward the earth. Air resistance can be neglected. When the rocket is80.0 m above the surface of the earth, it is moving downward with aspeed of 30.0 m/s. At that instant the rocket engines start to fire and producea constant upward force F on the rocket. Assume the change in therocket’s mass is negligible. What is the value of F if the rocket’s speedbecomes zero just as it reaches the surface of the earth, for a soft landing?(Hint: The net force on the rocket is the combination of the upwardforce F from the engines and the downward weight of the rocket.)
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