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Byju's Answer
Standard IX
Physics
Second Law of Motion
Starting from...
Question
Starting from rest, how long does it take the airboat to reach a speed of 12.0 m/s?
A
5.45 s
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B
6 s
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C
6.5 s
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D
4.45 s
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Solution
The correct option is
A
5.45 s
m
a
s
s
m
=
350
k
g
,
f
o
r
c
e
F
=
770
N
,
t
i
m
e
t
=
?
,
v
=
12
m
/
s
We know,
F
=
m
a
=
m
(
v
−
u
)
t
,
u
=
0
770
=
350
×
12
t
t
=
4200
770
t
=
5.45
s
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0
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