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Class 11 NEET Physics Laws of Motion Questions
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© examsnet.com
Question : 61
Total: 75
A force of
6
N
acts on a body at rest and of mass 1 kg. During this time, the body attains a velocity of
30
m
∕
s
. The time for which the force acts on the body is
( 1997 )
7 seconds
5 seconds
10 seconds
8 seconds
Validate
Solution:
Force
(
F
)
=
6
N
Initial velocity
(
u
)
=
0
Mass
(
m
)
=
1
kg
and final velocity
(
v
)
=
30
m
∕
s
Therefore acceleration
(
a
)
=
F
m
=
6
1
=
6
m
∕
s
2
and
final velocity
(
v
)
=
30
=
u
+
a
t
=
0
+
6
×
t
or
t
=
5
seconds.
© examsnet.com
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