How Is the Rocket's Acceleration Calculated After the Parachute Opens?

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Homework Help Overview

The discussion revolves around calculating the acceleration of a rocket after its parachute opens, specifically at 5 seconds post-deployment. The subject area includes dynamics and forces acting on the rocket.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • Participants explore the forces acting on the rocket, including gravitational force and the resistance force from the parachute. There is discussion about how these forces interact to affect acceleration.

Discussion Status

Participants are actively engaging with the problem, questioning the effects of various forces and how to calculate net acceleration. Some guidance has been provided regarding the relationship between forces and acceleration, but no consensus has been reached on the final calculation.

Contextual Notes

There is mention of specific values for the resistance force and mass, but the overall setup and assumptions about the forces acting on the rocket are still being clarified.

TyErd
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Homework Statement


What is the acceleration of the rocket at a time of 5seconds after the parachute opens.


Homework Equations


F=ma


The Attempt at a Solution


I simply thought the acceleration would be 9.8m/s/s
 

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TyErd said:

Homework Statement


What is the acceleration of the rocket at a time of 5seconds after the parachute opens.


Homework Equations


F=ma


The Attempt at a Solution


I simply thought the acceleration would be 9.8m/s/s
That would be the acceleration acting downward if there were no parachute. The retarding force R of the parachute acts upward, in the opposite direction of the gravitational force acting on the rocket.
 
You also have to take into consideration the resistance force on the parachute; that will affect the acceleration.
 
so the resistance force of the parachute is 1.8N. So I know its going to be F-1.8=mass(which I forgot to mention but its 0.2kg) * acceleration., But how do I calculate the upwards acceleration
 
F = ma, so a = F/m. What's the net acceleration, and in what direction?
 
would the net acceleration be 1.8/0.2?
 
No, that's the acceleration upward. The net acceleration would be the vector sum of the upward and downward accelerations.
 
ohh so a=(9.8-1.8)/0.2
 

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