Calculating a Model Rocket's Speed and Altitude Using Acceleration of Gravity

AI Thread Summary
To calculate the maximum altitude of a model rocket launched at 49 m/s, the relevant kinematic equations are applied. The maximum altitude can be determined using the formula for vertical motion, considering the acceleration due to gravity. For the speed and altitude at specific time intervals (1, 4, and 7 seconds), the equation x = x0 + v0t - 1/2gt^2 is recommended. The user expresses difficulty in applying this formula for the specified times. Clarifying the use of these equations will aid in solving the problem effectively.
gragsur
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Homework Statement


A model rocket leaves the ground , heading straight up at 49 m/s
a) what is its maximum altitude?
b) what are its speed and altitude at 1,4 & 7 seconds


Homework Equations


v=v0 + at
x= x0 + 1/2 (v0 + v) t
x= x0 + v0t + 1/2 at^2
v^2=v0^2 +2a (x-x0)



The Attempt at a Solution


Am able to work out maximum altitude no problem , for some reason can't get my head around b) ?
 
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Use the formula
x = xo + vot - 1/2*g*t^2 and find x at given time t.
 

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