Physics for Scientists and Engineers with Modern Physics, Technology Update
9th Edition
ISBN: 9781305401969
Author: SERWAY, Raymond A.; Jewett, John W.
Publisher: Cengage Learning
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Chapter 2, Problem 20P
An object moves along the x axis according to the equation x = 3.00t 2 − 2.00t + 3.00, where x is in meters and t is in seconds. Determine (a) the average speed between t = 2.00 s and t = 3.00 s, (b) the instantaneous speed at t = 2.00 s and at t = 3.00 s, (c) the average acceleration between t = 2.00 s and t = 3.00 s, and (d) the instantaneous acceleration at t = 2.00 s and t = 3.00 s. (e) At what time is the object at rest?
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An object moves along the x-axis according to the equation x(t) = (3.00 t² -2.00 +3.00) m, where t is in seconds. Determine:
a) the average speed between t = 2.00 s and t = 3.00 s
b) the instantaneous speed at t = 2.00 s and at t = 3.00 s
c) the average acceleration between t = 2.00 s and t = 3.00 s
d) the instantaneous acceleration at t = 2.00 s and t = 3.00 s.
An object has a position given by r = [(2.5 m/s^3)t^3 +(3.0 m/s)t]i +[3.0 m -(2.0 m/s^2)t^2]j where all quantities are in SI units. Calculate the magnitude of the acceleration of the object at time t = 2.00 s
An object moves along the x axis according to the equation x =
3.85t?
2.00t + 3.00, where x is in meters and t is in seconds.
(a) Determine the average speed between t = 2.10 s and t = 4.10 s.
13
The average speed is the distance traveled divided by the time. Is the distance traveled equal to the displacement in this case? m/s
(b) Determine the instantaneous speed at t = 2.10 s.
m/s
Determine the instantaneous speed at t = 4.10 s.
m/s
(c) Determine the average acceleration between t = 2.10 s and t = 4.10 s.
m/s²
(d) Determine the instantaneous acceleration at t = 2.10 s.
m/s²
Determine the instantaneous acceleration at t = 4.10 s.
m/s?
(e) At what time is the object at rest?
S
Chapter 2 Solutions
Physics for Scientists and Engineers with Modern Physics, Technology Update
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