Rocket Question~~Max Velocty and Ff

  • Thread starter Thread starter physicnoob101
  • Start date Start date
  • Tags Tags
    Rocket
Click For Summary
To determine the maximum velocity and force of friction for the model rocket, the weight of the rocket is 83.8 g, and it accelerates at 5.78 m/s². The normal force (Fn) was calculated as 82.266 N after converting grams to kilograms. The discussion raises questions about whether the acceleration is constant and how the rocket can reach a maximum height while accelerating. It is clarified that the acceleration is likely an average from the initial launch to the maximum height. Understanding these concepts is crucial for accurately solving the problem.
physicnoob101
Messages
8
Reaction score
0

Homework Statement


ok, so i need to find max velocity and force of friction of a model rocket. The rocket weights 83.8 g, accelerates at 5.78 m/ss. Its max height is 84.99 m. please help


Homework Equations


ok for Ff = μkFn
as for Vmax i have no idea


The Attempt at a Solution


ok so i found Fn = 82.266 N because u have to convert grams to kg. Thats all i can figure out.
 
Physics news on Phys.org
a little confused.

is the acceleration constant?

if so then how does it have a max height if it is constantly accelerating?

or is it an initial acceleration?
 
the question is related to my model rocket we launched a week ago, the accceleration is average from initial to the max height. don't know if that makes sense.
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

Similar threads

  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
Replies
14
Views
3K
Replies
3
Views
2K
  • · Replies 23 ·
Replies
23
Views
8K
Replies
13
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 6 ·
Replies
6
Views
4K