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JEE Main Physics Class 11 Motion in a Straight Line and Plane Part 3 Questions
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Question : 34
Total: 45
A particle of mass
10
g
moves in a straight line with retardation
2
x
, where
x
is the displacement in SI units. Its loss of kinetic energy for above displacement is
(
10
x
)
−
n
J. The value of
n
will be ________
[6-Apr-2023 shift 1]
Your Answer:
Validate
Solution:
👈: Video Solution
Given,
a
=
−
2
x
⇒
v
d
v
d
x
=
−
2
x
⇒
v
d
v
=
−
2
x
dx
⇒
∫
v
1
v
2
v
d
v
=
−
2
x
∫
0
x
dx
⇒
v
2
2
2
−
v
1
2
2
=
−
2
x
2
2
⇒
m
v
1
2
2
−
m
v
2
2
2
=
m
x
2
=
10
1000
x
2
=
10
−
2
x
2
=
(
10
x
)
−
2
n
=
2
.
© examsnet.com
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