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Byju's Answer
Standard XII
Physics
Newton's Laws of Motion
Two balls are...
Question
Two balls are thrown with initial velocities simultaneously at
t
=
0
. They will meet at
t
=
A
h
u
+
u
1
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B
2
h
u
+
u
1
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C
h
u
−
u
1
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D
2
h
u
−
u
1
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Solution
The correct option is
A
h
u
+
u
1
Relative velocity between them
=
(
u
1
+
u
2
)
Relative acceleration =0
Initial separation =h
time
=
h
u
+
u
1
Suggest Corrections
0
Similar questions
Q.
Two stones are thrown vertically upward simultaneously with their initial velocities u1 and u2 respectively. Prove that the heights reached by them would be in the ratio of u1²:u2².
Q.
Let
A
=
⎡
⎢
⎣
1
0
0
2
1
0
3
2
1
⎤
⎥
⎦
and
U
1
,
U
2
,
U
3
be column
matrices satisfying
A
U
1
=
⎡
⎢
⎣
1
0
0
⎤
⎥
⎦
,
A
U
2
=
⎡
⎢
⎣
2
3
0
⎤
⎥
⎦
,
A
U
3
=
⎡
⎢
⎣
2
3
1
⎤
⎥
⎦
. If U is
3
×
3
matrix whose columns are
U
1
,
U
2
,
U
3
, then
|
U
|
=
Q.
The molecular velocities of two gases at the same temperature are
u
1
and
u
2
and their molecular masses are
m
1
and
m
2
respectively which of the following expressions are correct?
Q.
A
=
⎡
⎢
⎣
1
0
0
2
1
0
3
2
1
⎤
⎥
⎦
,
U
1
,
U
2
and
U
3
are columns matrices satisfying
A
U
1
=
⎡
⎢
⎣
1
0
0
⎤
⎥
⎦
,
A
U
2
=
⎡
⎢
⎣
2
3
0
⎤
⎥
⎦
,
A
U
3
=
⎡
⎢
⎣
2
3
1
⎤
⎥
⎦
and
U
is
3
×
3
matrix whose columns are
U
1
,
U
2
,
U
3
then answer the following question
The value of
|
U
|
is
Q.
A
=
⎡
⎢
⎣
1
0
0
2
1
0
3
2
1
⎤
⎥
⎦
,
U
1
,
U
2
and
U
3
are columns matrices satisfying
A
U
1
=
⎡
⎢
⎣
1
0
0
⎤
⎥
⎦
,
A
U
2
=
⎡
⎢
⎣
2
3
0
⎤
⎥
⎦
,
A
U
3
=
⎡
⎢
⎣
2
3
1
⎤
⎥
⎦
and
U
is
3
×
3
matrix whose columns are
U
1
,
U
2
,
U
3
then answer the following question
The value of
[
3
2
0
]
U
⎡
⎢
⎣
3
2
0
⎤
⎥
⎦
is
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