Review. The instantaneous position of an object is specified by its position vector leading from a fixed origin to the location of the object, modeled as a particle. Suppose for a certain object the position vector is a function of time given by r → = 4 i ^ + 3 j ^ − 2 t k ^ , where r → is in meters and t is in seconds. (a) Evaluate d r → / d t . (b) What physical quantity does d r → / d t represent about the object?
Review. The instantaneous position of an object is specified by its position vector leading from a fixed origin to the location of the object, modeled as a particle. Suppose for a certain object the position vector is a function of time given by r → = 4 i ^ + 3 j ^ − 2 t k ^ , where r → is in meters and t is in seconds. (a) Evaluate d r → / d t . (b) What physical quantity does d r → / d t represent about the object?
Solution Summary: The author analyzes the value of dstackreltor with respect to time.
Review. The instantaneous position of an object is specified by its position vector leading from a fixed origin to the location of the object, modeled as a particle. Suppose for a certain object the position vector is a function of time given by
r
→
=
4
i
^
+
3
j
^
−
2
t
k
^
, where
r
→
is in meters and t is in seconds. (a) Evaluate
d
r
→
/
d
t
. (b) What physical quantity does
d
r
→
/
d
t
represent about the object?
I do not understand the process to answer the second part of question b. Please help me understand how to get there!
Rank the six combinations of electric charges on the basis of the electric force acting on 91. Define forces pointing to the right as positive and forces pointing to the left as negative.
Rank in increasing order by placing the most negative on the left and the most positive on the right. To rank items as equivalent, overlap them.
▸ View Available Hint(s)
[most negative
91 = +1nC
92 = +1nC
91 = -1nC
93 = +1nC
92- +1nC
93 = +1nC
-1nC
92- -1nC
93- -1nC
91= +1nC
92 = +1nC
93=-1nC
91
+1nC
92=-1nC
93=-1nC
91 = +1nC
2 = −1nC
93 = +1nC
The correct ranking cannot be determined.
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most positive
Part A
Find the x-component of the electric field at the origin, point O.
Express your answer in newtons per coulomb to three significant figures, keeping in mind that an x component that points to the right is positive.
▸ View Available Hint(s)
Eoz =
Η ΑΣΦ
?
N/C
Submit
Part B
Now, assume that charge q2 is negative; q2 = -6 nC, as shown in (Figure 2). What is the x-component of the net electric field at the origin, point O?
Express your answer in newtons per coulomb to three significant figures, keeping in mind that an x component that points to the right is positive.
▸ View Available Hint(s)
Eoz=
Η ΑΣΦ
?
N/C
Chapter 3 Solutions
Physics for Scientists and Engineers, Technology Update (No access codes included)
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