The discussion revolves around a physics problem involving the motion of a rocket that accelerates upward before running out of fuel. The problem requires determining how high the rocket climbs after fuel depletion, incorporating concepts of kinematics and gravitational effects.
Participants are actively engaging with the problem, clarifying concepts and calculations. Some guidance has been provided regarding the need to consider the rocket's final velocity after the acceleration phase and how to calculate the additional height gained due to gravity. There is an acknowledgment of potential discrepancies between calculated results and textbook answers, with emphasis on understanding the process over exact numerical agreement.
Participants note that the problem involves assumptions about initial conditions and the effects of gravity on the rocket's motion after fuel depletion. There is also mention of rounding errors in calculations, which may affect the final answer.
kurosaki69 said:Homework Statement
a rocket moves upward, starting from rest with an acceleration of +29.2 m/s^2 for 4 s. it runs out of fuel at the end of the 4 s and continues to move upward. how high does it rise?
Homework Equations
The Attempt at a Solution
i tried using the equation s=1/2at^2+v1t+s1. when i plug in the numbers i got 233.6 as a solution. when i check in the back off the book the answer was 941. Can someone please help point me in the right direction by telling me what i did wrong.
kurosaki69 said:i'm sorry what do you mean when you said "How much higher does it go against gravity alone?"
kurosaki69 said:so then my final velocity that i had calculated from the acceleration phase would replace my original initial velocity which as 0.
kurosaki69 said:does it matter if my final calculation is not the exact answer as the book's. when i had finished solving i got 938.5 instead of 941.