Finding Distance Traveled with Given Acceleration and Initial Velocity

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SUMMARY

The problem involves calculating the distance a car travels while stopping, given an acceleration function of a = -4t and an initial velocity of 32 m/s. The first step is to integrate the acceleration to find the velocity function, resulting in v = -2t² + 32. Next, integrating the velocity function yields the displacement function s = (2/3)t³ + 32t. The constant C2 can be set to zero by defining the initial position at t=0 as s=0, simplifying the calculation of distance traveled during deceleration.

PREREQUISITES
  • Understanding of calculus, specifically integration techniques.
  • Familiarity with kinematic equations and their applications.
  • Knowledge of initial conditions in physics problems.
  • Ability to manipulate algebraic expressions and functions.
NEXT STEPS
  • Study the principles of kinematics in physics, focusing on acceleration and velocity relationships.
  • Practice integration techniques, particularly in the context of motion equations.
  • Explore the concept of initial conditions and their impact on solving differential equations.
  • Learn about the graphical interpretation of motion equations and displacement functions.
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Students studying physics, particularly those focusing on mechanics, as well as educators looking for examples of applying calculus to real-world motion problems.

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Homework Statement



In coming to a stop the acceleration of a car is given as a= -4t. If it is traveling at 32m/s when the brakes are applied, how far does is travel while stopping?


The Attempt at a Solution



1.) Integrate acceleration to find velocity as a function of time

v= -2t^2 + C1

at t=0 , v = 32m/s

v = -2t^2 + 32


2.) Integrate velocity to find displacement as a funtion of time

s = (2/3)(t^3) + 32t + C2.


This is where I get stuck.

Is it correct to assume that at t=0 , s will be zero and therefore C2 is zero?
 
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It's your coordinate system so it's your choice! The problem asks for the distance the car travels- that is the difference between s when the car stops and s when the car is going 32 m/s. Yes you can take "s= 0" to be the point at which the car is going 32 m/s. In fact, if you take s to be any number you like, when you do the subtraction, that number will cancel.
 

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