Anayza D.

asked • 11/09/20

Finding Velocity, Acceleration and if the particle is increasing or decreasing

The position of an object moving along a line at any time 𝑡 ≥ 0 is given by the function 𝑠(𝑡) = 𝑡3 − 9𝑡2 + 18 , where s is measured in feet and t is measured in seconds.


  1. Find velocity of particle at t=4
  2. Find the acceleration of the particle at t=4
  3. Was the speed of the particle increasing of the particle increasing or decreasing at t=4? justify the answer.
  4. For 𝑡 > 0, find the acceleration when the particle changes direction.

2 Answers By Expert Tutors

By:

Joaquin B. answered • 11/09/20

Tutor
New to Wyzant

Chemical Engineer with 10+ years teaching/tutoring Calculus

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