Calculating Time in Air for a Vertically Launched Rocket

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Homework Help Overview

The discussion revolves around calculating the time a toy rocket remains in the air after being launched vertically with a specified initial velocity. The subject area pertains to kinematics and motion under gravity.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to use the formula t=(v-u)/a to find the time, expressing uncertainty about the correctness of this method. Some participants confirm the approach while others clarify aspects of the motion.

Discussion Status

The conversation is ongoing, with participants providing feedback on the original poster's method. There is a mix of agreement and clarification regarding the calculations involved.

Contextual Notes

Participants are discussing the implications of the rocket's velocity at its apex and the method of calculating total time in the air, indicating a focus on understanding the kinematic equations involved.

kingyof2thejring
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Question 3
A toy rocket is fired vertically upwards with an initial velocity of 29.2 ms-1. Calculate how long (in s) the rocket stays in the air before it returns to the ground.
s=?
u=29.2
v=0
a=-g
t=?
i've used t=(v-u)/a and then multiplied the answer by 2
is this the correct method to calculate the answer.
thanks in advance
 
Physics news on Phys.org
Looks good to me.
 
v is 0 at the apex.

Edit: Sorry, I see you multiplied by 2.
 
Last edited:
cheers!
 

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