How Do You Calculate Constant Acceleration for Airplane Takeoff?

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SUMMARY

The discussion focuses on calculating the constant acceleration required for an airplane to reach a takeoff velocity of 75 m/s after traveling 240 m on an aircraft carrier. The initial equations presented include the integral forms of velocity and displacement, but the participants emphasize the need for a clearer understanding of kinematic relationships. The correct approach involves recognizing that acceleration is constant and utilizing the fundamental kinematic equations to derive the necessary acceleration value.

PREREQUISITES
  • Understanding of basic kinematics, including displacement, velocity, and acceleration.
  • Familiarity with integral calculus as it applies to motion equations.
  • Knowledge of the fundamental kinematic equations for uniformly accelerated motion.
  • Ability to manipulate equations to solve for unknown variables in physics problems.
NEXT STEPS
  • Study the kinematic equations for constant acceleration, specifically the equation \( s = ut + \frac{1}{2}at^2 \).
  • Learn how to derive acceleration from velocity and displacement using calculus.
  • Practice solving problems involving constant acceleration in various contexts, such as projectile motion.
  • Explore the relationship between time, velocity, and acceleration in physics simulations or software tools.
USEFUL FOR

This discussion is beneficial for physics students, educators, and anyone interested in understanding the principles of motion and acceleration in real-world applications, particularly in aviation and engineering contexts.

biamin
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Homework Statement



If an Airplane is to attain a take off velocity of 75 m/s after traveling 240 m along the flight deck of an aircraft carrier. Find the Aircrafts acceleration(asssumed constant)



Homework Equations



S=∫vdt
V=∫adt

V=75 m/s
S=240m
t(time)=0

The Attempt at a Solution



S=∫75dt
= 75t + C
240 = 75t + C
240 = 75(0) + C
C = 240
S=75t + 240
V=∫75t+240dt
V=75t^2/2 + 240t

Not sure what to do next or if I am even on the right track.
thanks for any help
 
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Look at the problem this way: When t = 0, s = v = 0
The plane then undergoes a constant acceleration a

At time t = t2, the plane has velocity v = 75 m/s and has traveled s = 240 m

Notice that the plane's velocity is not constant.

Can you come up with a better set of equations than in the OP?
 
Thanks for the nudge. This is the part I struggle with I guess I haven't learned the kinematic relationships very well.

So, if velocity isn't constant then it has to be dependent on the time & displacement.

Would a better equation be s = ∫240t?
 
You're just guessing now.

Start with the basics. v = ds/dt a = dv/dt

Since you know a is constant, work with that equation first.
 

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