For questions 2 & 3, use the following problem: An object moves on a straight line so tha after t seconds its distance in millimeters (mm) from its original position is given by x(1) =1² – 21 . 2. Find the acceleration at t = 3: 1 mm/sec? В. 2 mm/sec? C. 0 mm/sec? А. D. 4 mm/sec? Е. 6 mm/sec? F. None of these. 3. At what time does the object change direction? A. t=1 sec B. t= 2 sec C. t= 0.5 sec D. t=4 sec E. Never F. None of these.

College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter1: Introduction: The Nature Of Science And Physics
Section: Chapter Questions
Problem 1PE: The speed limit on some interstate highways is roughly 100 km/h. (a) What is this in meters per...
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For questions 2 & 3, use the following problem: An object moves on a straight line so that
after t seconds its distance in millimeters (mm) from its original position is given by
x(t) =1? – 2t.
2. Find the acceleration at t = 3:
А.
1 mm/sec?
В.
2 mm/sec?
C.
O mm/sec?
D.
4 mm/sec?
E.
6 mm/sec?
F. None of these.
3. At what time does the object change direction?
A. t=1 sec
B. t=2 sec
C. t= 0.5 sec
D. t= 4 sec
E. Never
F. None of these.
Transcribed Image Text:For questions 2 & 3, use the following problem: An object moves on a straight line so that after t seconds its distance in millimeters (mm) from its original position is given by x(t) =1? – 2t. 2. Find the acceleration at t = 3: А. 1 mm/sec? В. 2 mm/sec? C. O mm/sec? D. 4 mm/sec? E. 6 mm/sec? F. None of these. 3. At what time does the object change direction? A. t=1 sec B. t=2 sec C. t= 0.5 sec D. t= 4 sec E. Never F. None of these.
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