7Physics -...

SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
21)
A cat runs along a straight line (the x- axis) from point A to point B to point
as shown in the figure. The distance between points
A
and
C
is 5.00 m, the
distance between points B and C is 10.0 m, and the positive direction of the
x- axis points to the right. The time to run from A to B is 20.0 s, and the time
from B to C is 8.00 s. As the cat runs along the x -axis between points A and
(a) what is the magnitude of its average velocity?
(b) what is its average speed?
C ,
C
21)
22)
The figure shows the position of an object as a function of time. During the
time interval from time t = 0.0 s and time t = 9.0 s
(a) what is the length of the path the object followed?
(b) what is the displacement of the object?
22)
15

23)
As part of an exercise program, a woman walks south at a speed of 2.00 m/s for
60.0 minutes. She then turns around and walks north a distance 3000 m in 25.0
minutes
(a) What is the woman's average velocity during her entire motion?
23)
(b) What is the woman's average speed during her entire motion?
24)
The figure shows the position of an object as a function of time, with all
numbers accurate to two significant figures. Between time t = 0.0 s and time
t = 9.0 s
(a) what is the average speed of the object?