Question
In: Physics
On a trip, you get stuck in slow traffic and have to drive 90.0 km at...
On a trip, you get stuck in slow traffic and have to drive 90.0 km at 30.0 km/hr. Then the traffic clears up, and you're able to drive another 90.0 km at 60.0 km/hr.
a) In the original description of the trip, why was your overall average speed lower than 45.0 km/hr, the mathematical average of 30.0 km/hr and 60.0 km/hr?
b) Determine the speed at which you'd have to have driven the second 90.0 km so that your overall average speed would have been 45.0 km/hr.
c) What are the largest and smallest possible average velocities for this trip, as originally described? What further information would allow you to determine where in this range your actual average velocity was? Explain in practical terms.
Solutions
genius_generous answered 1 year agoRelated Solutions
On a trip, you get stuck in slow traffic and have to drive 90.0 km at...
On a trip, you get stuck in slow traffic and have to drive 90.0
km at 30.0 km/hr. Then the traffic clears up, and you're able to
drive another 90.0 km at 60.0 km/hr.
a) Calculate your overall average speed for this 180.0 km trip.
Check: it's not 45.0 km/hr! See the next question as well. Use the
definition of average speed in physics.
b) Prove that if you'd driven 180. km at 60.0 km/hr for the
second leg, your...
Fuming because you are stuck in traffic? Roadway congestion is a costly item, both in time...
Fuming because you are stuck in traffic? Roadway congestion is a
costly item, both in time wasted and fuel wasted. Let
xrepresent the average annual hours per person spent in
traffic delays and let y represent the average annual
gallons of fuel wasted per person in traffic delays. A random
sample of eight cities showed the following data.
x (hr)
27
5
22
39
22
22
18
5
y
(gal)
47
3
34
57
35
38
25
9
(a) Draw...
Fuming because you are stuck in traffic? Roadway congestion is a costly item, both in time...
Fuming because you are stuck in traffic? Roadway congestion is a
costly item, both in time wasted and fuel wasted. Let x represent
the average annual hours per person spent in traffic delays and let
y represent the average annual gallons of fuel wasted per person in
traffic delays. A random sample of eight cities showed the
following data. x (hr) 29 5 20 35 22 25 19 5 y (gal) 48 3 34 53 35
38 29 9 (a)...
Fuming because you are stuck in traffic? Roadway congestion is a costly item, both in time...
Fuming because you are stuck in traffic? Roadway congestion is a
costly item, both in time wasted and fuel wasted. Let x
represent the average annual hours per person spent in traffic
delays and let y represent the average annual gallons of
fuel wasted per person in traffic delays. A random sample of eight
cities showed the following data.
x (hr)
26
5
18
39
19
25
15
5
y
(gal)
47
3
33
57
34
39
29
9
(a)...
Fuming because you are stuck in traffic? Roadway congestion is a costly item, both in time...
Fuming because you are stuck in traffic? Roadway congestion is a
costly item, both in time wasted and fuel wasted. Let x
represent the average annual hours per person spent in traffic
delays and let y represent the average annual gallons of
fuel wasted per person in traffic delays. A random sample of eight
cities showed the following data.
x (hr)
27
5
19
38
18
25
15
5
y
(gal)
48
3
32
54
31
35
25
9
(a)...
Fuming because you are stuck in traffic? Roadway congestion is a costly item, both in time...
Fuming because you are stuck in traffic? Roadway congestion is a
costly item, both in time wasted and fuel wasted. Let x represent
the average annual hours per person spent in traffic delays and let
y represent the average annual gallons of fuel wasted per person in
traffic delays. A random sample of eight cities showed the
following data. x (hr) 27 5 18 39 23 25 17 5 y (gal) 46 3 31 57 33
39 27 9 (a)...
Fuming because you are stuck in traffic? Roadway congestion is a costly item, both in time...
Fuming because you are stuck in traffic? Roadway congestion is a
costly item, both in time wasted and fuel wasted. Let
xrepresent the average annual hours per person spent in
traffic delays and let y represent the average annual
gallons of fuel wasted per person in traffic delays. A random
sample of eight cities showed the following data.
x (hr)
25
5
23
37
23
23
18
5
y
(gal)
46
3
35
56
32
37
26
9
(a) Draw...
Fuming because you are stuck in traffic? Roadway congestion is a costly item, both in time...
Fuming because you are stuck in traffic? Roadway congestion is a
costly item, both in time wasted and fuel wasted. Let x
represent the average annual hours per person spent in traffic
delays and let y represent the average annual gallons of
fuel wasted per person in traffic delays. A random sample of eight
cities showed the following data.
x (hr)
26
5
23
39
22
23
19
5
y
(gal)
49
3
35
55
31
37
25
9
The...
Fuming because you are stuck in traffic? Roadway congestion is a costly item, both in time...
Fuming because you are stuck in traffic? Roadway congestion is a
costly item, both in time wasted and fuel wasted. Let x
represent the average annual hours per person spent in traffic
delays and let y represent the average annual gallons of
fuel wasted per person in traffic delays. A random sample of eight
cities showed the following data.
x (hr)
27
5
19
36
21
22
18
5
y
(gal)
45
3
31
56
33
36
26
9
(a)...
Fuming because you are stuck in traffic? Roadway congestion is a costly item, both in time...
Fuming because you are stuck in traffic? Roadway congestion is a
costly item, both in time wasted and fuel wasted. Let x
represent the average annual hours per person spent in traffic
delays and let y represent the average annual gallons of
fuel wasted per person in traffic delays. A random sample of eight
cities showed the following data.
x (hr)
26
5
21
37
22
23
18
5
y
(gal)
45
3
34
53
33
37
28
9
1....
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