Newtonian Mechanics : Rectillinear Motion of a Particle

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SUMMARY

The discussion focuses on solving the rectilinear motion of a particle under various force functions: (a) Fx = F0 + Ct, (b) Fx = F0 sin(Ct) Ct, and (c) Fx = F0e^(ct). Participants clarify that integration with respect to time requires knowing time as a function of position, and emphasize the importance of correct notation, particularly distinguishing between F subscript x and F times x. Mistakes in the final steps of calculations for parts (a) and (b) are also highlighted, indicating the need for careful verification of solutions.

PREREQUISITES
  • Understanding of Newton's Second Law of Motion
  • Familiarity with calculus, specifically integration techniques
  • Knowledge of force functions and their implications on motion
  • Ability to interpret and correct mathematical notation
NEXT STEPS
  • Study the derivation of velocity and position functions from force functions in classical mechanics
  • Learn about integrating force functions to find acceleration and velocity
  • Explore the implications of different force functions on particle motion
  • Review common mistakes in mathematical notation and their impact on problem-solving
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Students of physics, particularly those studying classical mechanics, educators teaching Newtonian concepts, and anyone interested in mastering the application of calculus in motion analysis.

Fia Ismi Nur Alfiah
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Homework Statement


Find the velocity ± and the position x as functions of the time t for a particle of mass m, which starts from rest at x =0 and t =0, subject to the following force functions:
(a) Fx = F0 + Ct
(b) Fx = F0 sin Ct Ct
(c) Fx = F0e^ct
where F0 and c are positive constants.

Homework Equations

The Attempt at a Solution

 

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You cannot integrate t with respect to x until you know what t is as a function of x.
I am not sure why you want to integrate wrt x anyway. What else can you do?
By the way, your typed notation is a bit confusing. You mean Fx=F0+Ct. I.e. F subscript x, not F times x.
 
haruspex said:
You cannot integrate t with respect to x until you know what t is as a function of x.
I am not sure why you want to integrate wrt x anyway. What else can you do?
By the way, your typed notation is a bit confusing. You mean Fx=F0+Ct. I.e. F subscript x, not F times x.
I have checked my homework, how about my answer here?
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You made a mistake in the final step in both a and b.
(In post #1 for part b you specified the force as F0sin Ct Ct. i assume the second Ct was a typo.)
 

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