Math Problem Statement

Suppose a particle moves along the x-axis and that its position after t seconds is given by the function s(t). Suppose further that the derivative of s(t) is given by s'(t) = 2t^2 - 4t + 3. What is the instantaneous velocity of the particle after 2 seconds?

Solution

We are asked to find the instantaneous velocity of the particle after 2 seconds, given that the derivative of the position function s(t)s(t), which is the velocity function s(t)s'(t), is:

s(t)=2t24t+3s'(t) = 2t^2 - 4t + 3

To find the instantaneous velocity at t=2t = 2, we need to substitute t=2t = 2 into s(t)s'(t).

s(2)=2(2)24(2)+3s'(2) = 2(2)^2 - 4(2) + 3 s(2)=2(4)8+3s'(2) = 2(4) - 8 + 3 s(2)=88+3s'(2) = 8 - 8 + 3 s(2)=3s'(2) = 3

Thus, the instantaneous velocity at t=2t = 2 seconds is 33. The correct answer is 3.

Do you want any further details or have questions?

Here are 5 related questions:

  1. What is the general meaning of instantaneous velocity?
  2. How do you interpret the position function in terms of particle motion?
  3. What would happen if we needed to find the velocity at t=0t = 0?
  4. How do we find the acceleration from the velocity function?
  5. What if the position function s(t)s(t) was given directly—how would you find velocity?

Tip: The instantaneous velocity is always the derivative of the position function at a specific time.

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Math Problem Analysis

Mathematical Concepts

Calculus
Instantaneous Velocity
Derivatives

Formulas

s'(t) = 2t^2 - 4t + 3

Theorems

Fundamental Theorem of Calculus

Suitable Grade Level

Grades 11-12 or College level (Introductory Calculus)