A rocket moves upward, starting from rest with an acceleration of

Click For Summary
The discussion centers on calculating the height a rocket reaches after accelerating upward at 29.0 m/s² for 8.00 seconds before running out of fuel. Participants clarify the distinction between acceleration and velocity, emphasizing that 29.0 m/s² represents acceleration, not velocity. The relevant equation for displacement during uniform acceleration is highlighted, specifically deltaX = (1/2) * acceleration * (time²). The importance of understanding these concepts is stressed to solve the problem accurately. Overall, the thread focuses on applying the correct equations of motion to determine the rocket's height.
lettertwelve
Messages
54
Reaction score
0

Homework Statement



A rocket moves upward, starting from rest with an acceleration of 29.0 m/s^2 for 8.00 s. It runs out of fuel at the end of the 8.00 s but does not stop. How high does it rise above the ground? (in meters)


Homework Equations



deltaX=(1/2)final velocity * change in time ?

The Attempt at a Solution




i really don't understand which of the equations of straight-line motion would be relevant, and how, for example: 29m/s^2 is DIFFERENT than just 29m/s
 
Physics news on Phys.org
Yes, 29.0 is the acceleration not velocity... what are your displacement equations for uniform acceleration?
 
Thread 'Correct statement about size of wire to produce larger extension'

Thread 'Correct statement about size of wire to produce larger extension'

The answer is (B) but I don't really understand why. Based on formula of Young Modulus: $$x=\frac{FL}{AE}$$ The second wire made of the same material so it means they have same Young Modulus. Larger extension means larger value of ##x## so to get larger value of ##x## we can increase ##F## and ##L## and decrease ##A## I am not sure whether there is change in ##F## for first and second wire so I will just assume ##F## does not change. It leaves (B) and (C) as possible options so why is (C)...
View full post »

Similar threads

Determine when (m), and how long the rocket should fire.
  • · Replies 2 ·
Replies
2
Views
1K
Model Rocket Launch: Maximum Height, Time, and Duration Calculations
  • · Replies 1 ·
Replies
1
Views
2K
What is the Correct Acceleration of the Rocket During Its Launch Phase?
  • · Replies 3 ·
Replies
3
Views
2K
Water Rocket Science Project by Tanguy: Reach 11,2k m/s!
  • · Replies 14 ·
Replies
14
Views
2K
Constant acceleration in a rocket
  • · Replies 4 ·
Replies
4
Views
2K
Upward and downward movement of a rocket with the equation of motion
  • · Replies 13 ·
Replies
13
Views
2K
What is the Maximum Height and Time of a Rocket's Flight?
  • · Replies 5 ·
Replies
5
Views
2K
When is the acceleration due to gravity negative and when is it positive?
  • · Replies 13 ·
Replies
13
Views
5K
A rocket going up with acceleration =
  • · Replies 2 ·
Replies
2
Views
4K
Force and acceleration of a rocket
  • · Replies 3 ·
Replies
3
Views
2K