i need the answer quickly 8. A particle moves so that its position as a function of time is ř=i-4t²j+tk. Writeexpressions for a) its velocity and b) its acceleration as functions of time.9. a) What is the magnitude of the average acceleration ofskier who, startingfrom rest, reaches a speed of 8m/s when going down a slope for 5s? b) How fardoes the skier travel in this time?

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Answered: 8. A particle moves so that its…

8. A particle moves so that its position as a function of time is r=i-4t°j+ tk. Write expressions for a) its velocity and b) its acceleration as functions of time.

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter2: Motion In One Dimension

Section: Chapter Questions

Problem 13P: A person lakes a trip, driving with a constant speed of 89.5 km/h, except, for a 22.0-min rest stop....

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Question

i need the answer quickly

8. A particle moves so that its position as a function of time is ř=i-4t²j+tk. Write
expressions for a) its velocity and b) its acceleration as functions of time.
9. a) What is the magnitude of the average acceleration of
skier who, starting
from rest, reaches a speed of 8m/s when going down a slope for 5s? b) How far
does the skier travel in this time?

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