Finding Time t for Instantaneous & Average Velocity: Particle Motion

  • Thread starter Thread starter sammiyahc0
  • Start date Start date
  • Tags Tags
    Velocity
Click For Summary

Homework Help Overview

The discussion revolves around a particle's motion described by the position function s(t) = 3t² - 3t + 5 cm. The original poster seeks to find a time t where the instantaneous velocity matches the average velocity over a 10-second interval.

Discussion Character

  • Exploratory, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the calculation of average velocity and the method to find instantaneous velocity, with references to derivatives and changes in position. Questions arise regarding the definitions of variables used in the equations.

Discussion Status

Some participants have provided insights into calculating average velocity and the role of derivatives in finding instantaneous velocity. There is an ongoing exploration of the definitions and relationships between the variables involved.

Contextual Notes

Participants are working within the constraints of a 10-second time frame and are clarifying the definitions of position and velocity in the context of the problem.

sammiyahc0
Messages
9
Reaction score
0
The position of a particle moving in a straight line during a 10–second trip is s(t) = 3t2 − 3t + 5 cm.Find a time t at which the instantaneous velocity is equal to the average velocity for the entire trip.
 
Physics news on Phys.org
Average velocity = (x2 - x1)/Δt

How do you find instantaneous velocity?
 
the derivative
 
what does x represent?
 
The position. x2 - x1 is the change in position. Your object starts at one point, and ten seconds later, it's somewhere else. That somewhere else is x2.
 
sammiyahc0 said:
what does x represent?
Your "s". The average speed, between t= 0 and t=10, is (s(10)- s(0))/(10 - 0). Calculate that, set it equal to s'(t) and solve for t.
 

Similar threads

Replies
6
Views
2K
Replies
5
Views
2K
  • · Replies 19 ·
Replies
19
Views
9K
  • · Replies 9 ·
Replies
9
Views
1K
  • · Replies 13 ·
Replies
13
Views
2K
  • · Replies 7 ·
Replies
7
Views
1K
  • · Replies 22 ·
Replies
22
Views
5K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 8 ·
Replies
8
Views
4K
Replies
6
Views
2K