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NEET 2021 Model Test Paper 6
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© examsnet.com
Question : 29
Total: 180
A particle of mass m at rest is acted upon by a force F for a time t. Its Kinetic energy after an interval t is :-
F
2
t
2
m
F
2
t
2
2
m
F
2
t
2
3
m
F
t
2
m
Validate
Solution:
a
=
F
m
S
=
Ut
+
1
2
at
2
;
S
=
0
+
1
2
(
F
m
)
t
2
→
W
=
→
F
.
→
S
;
W
=
(
F
)
(
Ft
2
2
m
)
W
=
F
2
t
2
2
m
© examsnet.com
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