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Byju's Answer
Standard XII
Physics
Speed Time Graph
A body of mas...
Question
A body of mass
2
k
g
is moving in straight line for which
v
−
x
graph is shown in the figure. Magnitude of force acting on the body at
x
=
10
m
is
5
k
N
. Find the value of
k
.
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Solution
We know,
|
F
|
=
m
|
a
|
given m=2kg.
And,
|
a
|
=
|
v
d
v
d
x
|
From the graph,
d
v
d
x
=
−
1
And,
v
a
t
x
=
10
=
10
m
/
s
|
a
|
a
t
x
=
10
=
10
F
=
10
×
2
=
20
N
According to question,
F
=
5
k
Hence
k
=
4
.
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