Net Force of a Model Rocket in Free Fall

AI Thread Summary
The model rocket experiences a net force of 2.0 N while ascending under thrust. Once the fuel is exhausted, the rocket enters free fall, where the only force acting on it is gravity, resulting in a net force of -4.9 N (downward). As it ascends and reaches its peak, the net force remains -4.9 N during the turnaround. When falling back to the ground, the net force continues to be -4.9 N until it impacts the ground. The discussion emphasizes the change in net force due to the transition from powered flight to free fall.
wicked_vixen
Messages
4
Reaction score
0
A model rocket with a mass of 0.50 kg is fired vertically from the ground. Assume that it is streamlined enough that air resistance can be ignored. Suppose it ascends under the influence of a constant net force of 2.0 N acting in a vertical direction and travels for 6.0 s before its fuel is exhausted. Then it keeps moving as a particle-like object in free-fall as it continues upward, turns around, and falls back down.

What is the net force on the rocket when it continues upward as a free fall particle? as it turns around? When it is traveling back toward the ground?
 
Last edited:
Physics news on Phys.org
Welcome to PF!

Hi wicked_vixen! Welcome to PF! :smile:
wicked_vixen said:
… before its fuel is exhausted. Then it keeps moving as a particle-like object in free-fall as it continues upward, turns around, and falls back down.

What is the net force on the rocket when it continues upward as a free fall particle? as it turns around? When it is traveling back toward the ground?


What do you think?

What forces are acting on the rocket once the fuel stops?

Do they change, and if so, how? :smile:
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Impact force of model rocket with parachute
Replies
17
Views
2K
Force and acceleration of a rocket
Replies
3
Views
2K
Analyzing the Fall of a Chain: Problem 103 of 200 Puzzling Physics Problems
Replies
7
Views
2K
How Long Does It Take for a Rocket to Return After Stopping Its Initial Ascent?
Replies
1
Views
1K
Spring and Energy: Rocket clamped to an anchored spring
Replies
1
Views
2K
10kg Block free falls from 500ft to 2ft into the ground.
Replies
6
Views
2K
Work-kinetic energy theorem - model rocket velocity/height
Replies
6
Views
4K
Cylinder rolling due to magnetic force
Replies
4
Views
1K
Kinematics: find maximum height
Replies
2
Views
4K
Help Evaluating Mathematical Modelling of Physical Problems
Replies
47
Views
4K

Hot Threads

Recent Insights

Back
Top