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Motion and Time
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Distance - Time Graph
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A dancer demonstrating dance steps along
Question
A dancer demonstrating dance steps along a straight line. The displacement time graph is given.
Find the average speed for the dance step depicted by CD.
A
1
m
s
−
1
B
2
m
s
−
1
C
2
.
7
5
m
s
−
1
D
0
.
8
9
m
s
−
1
Medium
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Updated on : 2022-09-05
Solution
Verified by Toppr
Correct option is B)
Average speed is defined as the ratio of the distance covered to the total time taken .
Average speed
s
a
v
=
t
i
m
e
t
a
k
e
n
D
i
s
t
a
n
c
e
c
o
v
e
r
e
d
For step CD
Initial position is
4
, final position is
0
, hence distance covered
=
4
m
Total time is
6
−
4
=
2
s
e
c
So average speed is
s
=
2
4
=
2
m
/
s
So option
B
is correct.
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