Kinematics problem, don't know how to find unknown variables

AI Thread Summary
A rocket is launched vertically with an initial speed of 500 m/s, and the equations of motion provided include Yf = 1/2 A(T)^2 + Vi(T) + Yi and Vf = A(T) + Vi. The user has derived Vf = (-9.8)(T) + 500 m/s and Yf = 4.9T^2 + 500T + 0 but is struggling to solve for the unknown variables, particularly time (T). The main goal is to find all variables in the equations based on the given initial conditions. Clarification on the specific question being asked is also needed. Understanding the relationships between the variables is crucial for solving the problem effectively.
Physicsnoob10
Messages
2
Reaction score
0

Homework Statement


A rocket is shot straight up with an initial speed at 500 m/s.


Homework Equations


The equations the teacher went over beforehand were

Yf = 1/2 A(T)^2 + Vi(T) + Yi
Vf = A(T) + Vi

The Attempt at a Solution


So far I have

Vf = (-9.8)(T) + 500 m/s
Yf = 4.9T2 + 500T + 0

...and I have no idea how to go about solving for the rest of the unknown variables. It seems like I need T somehow, but I don't know how I can get it from the information given.
 
Physics news on Phys.org
What is the question?
 
Oh, sorry. Guess I didn't make that clear. You basically just have to find all the variables in the equations.
 
I still do not know what is the question.
If you have a rocket with velocity of 500m/s, you can be anywhere in this universe.
Maybe on any planet.
 
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...
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 .

Similar threads

Replies
1
Views
3K
Replies
2
Views
4K
Replies
7
Views
2K
Replies
34
Views
3K
Replies
3
Views
2K
Back
Top