Question #2 A race car, traveling at constant speed, makes one lap around a circular track of radius rin a time t. The circumference of a circle is given by C= 2nr. Which one of the following statements concerning this car is true? a) The displacement of the car does not change with time. b) The instantaneous velocity of the car is constant. c) The average speed of the car is the same over any time interval. d) The average velocity of the car is the same over any time interval. e) The average speed of the car over any time interval is equal to the magnitude of the average velocity over the same time interval.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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د الحركة في بعد واحد.. . .
Question #2
A race car, traveling at constant speed, makes one lap around
a circular track of radius rin a time t. The circumference of a
circle is given by C= 2nr. Which one of the following
statements concerning this car is true?
a) The displacement of the car does not change with time.
b) The instantaneous velocity of the car is constant.
c) The average speed of the car is the same over any time
interval.
d) The average velocity of the car is the same over any time
interval.
e) The average speed of the car over any time interval is equal
to the magnitude of the average velocity over the same time
interval.
Question #3
A turtle and a rabbit are to have a race. The turtle's/ 10
average speed is 0.9 m/s. The rabbit's average speed is
9 m/s. The distance from the starting line to the finish line
is 1500 m. The rabbit decides to let the turtle run before
he starts running to give the turtle a head start. What,
approximately, is the maximum time the rabbit can wait
before starting to run and still win the race?
a) 15 minutes
b) 18 minutes
c) 20 minutes
d) 22 minutes
e) 25 minutes
Question #4
A turtle, moving at a constant velocity of 0.9 m/s due
south, is in a race with a rabbit, who runs at a moderate
speed of 9 m/s. When the turtle is 45 m from the finish
line, the rabbit begins taunting the turtle by running from
the turtle to the finish line (without crossing it) and back to
the turtle. The rabbit continues going back and forth
between the turtle and the finish line until the turtle
crosses the finish line. About how many meters does the
rabbit travel as the turtle travels that last 45 m? Assume
the rabbit always runs at 9 m/s and doesn't lose any time
Transcribed Image Text:2 د الحركة في بعد واحد.. . . Question #2 A race car, traveling at constant speed, makes one lap around a circular track of radius rin a time t. The circumference of a circle is given by C= 2nr. Which one of the following statements concerning this car is true? a) The displacement of the car does not change with time. b) The instantaneous velocity of the car is constant. c) The average speed of the car is the same over any time interval. d) The average velocity of the car is the same over any time interval. e) The average speed of the car over any time interval is equal to the magnitude of the average velocity over the same time interval. Question #3 A turtle and a rabbit are to have a race. The turtle's/ 10 average speed is 0.9 m/s. The rabbit's average speed is 9 m/s. The distance from the starting line to the finish line is 1500 m. The rabbit decides to let the turtle run before he starts running to give the turtle a head start. What, approximately, is the maximum time the rabbit can wait before starting to run and still win the race? a) 15 minutes b) 18 minutes c) 20 minutes d) 22 minutes e) 25 minutes Question #4 A turtle, moving at a constant velocity of 0.9 m/s due south, is in a race with a rabbit, who runs at a moderate speed of 9 m/s. When the turtle is 45 m from the finish line, the rabbit begins taunting the turtle by running from the turtle to the finish line (without crossing it) and back to the turtle. The rabbit continues going back and forth between the turtle and the finish line until the turtle crosses the finish line. About how many meters does the rabbit travel as the turtle travels that last 45 m? Assume the rabbit always runs at 9 m/s and doesn't lose any time
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