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AIEEE 2008 Solved Paper
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© examsnet.com
Question : 40
Total: 104
An athlete in the Olympic games covers a distance of
100
m
in
10
s
. His kinetic energy can be estimated to be in the range
200
J
−
500
J
2
×
10
5
J
−
3
×
10
5
J
20
,
000
J
−
50
,
000
J
2
,
000
J
−
5
,
000
J
Validate
Solution:
The average speed of the athlete
v
=
100
10
=
10
m
/
s
∴
K
.
E
.
=
1
2
m
v
2
If mass of athlete is
40
kg
then,
K
.
E
.
=
1
2
×
40
×
(
10
)
2
=
2000
J
If mass of athlete is
100
kg
then,
K
.
E
.
=
1
2
×
100
×
(
10
)
2
=
5000
J
His kinetic energy can be in the range
=
2000
J
to
5000
J
.
© examsnet.com
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