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Byju's Answer
Standard XII
Physics
Error and Uncertainty
If the linear...
Question
If the linear momentum is increased by
50
% then kinetic energy will be increased by
A
50
%
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B
100
%
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C
125
%
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D
25
%
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Solution
The correct option is
C
125
%
→
As momentum (P) and
kinetic energy (K) are
related by,
K
=
P
2
2
m
let original =
K
1
,
P
1
New =
K
2
,
P
2
⇒
P
2
=
P
1
+
50
100
P
1
=
3
2
P
1
⇒
K
2
=
P
2
2
2
m
=
9
4
P
2
1
2
m
=
9
4
K
1
% increase =
K
2
−
K
1
K
1
×
100
=
(
9
4
−
1
)
K
1
K
1
×
100
=
5
4
×
100
%
=
125
%
⇒
(
C
)
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1
Similar questions
Q.
The linear momentum of a body is increased by
50
%
its kinetic energy will increase by
Q.
Assertion :If momentum of a body increases by
50
%, its kinetic energy will increase by
125
%. Reason: Kinetic energy is proportional to square of velocity
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