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BITSAT 2023 Shift 2 Solved Paper
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© examsnet.com
Question : 16
Total: 130
The torque of a force
5
^
i
+
3
^
j
−
7
^
k
about the origin is
τ
. If the force acts on a particle whose position vector is
2
^
i
+
2
^
j
+
^
k
, then the value of
τ
will be :
11
^
i
+
19
^
j
−
4
^
k
−
11
^
i
+
9
^
j
−
16
^
k
−
17
^
i
+
19
^
j
−
4
^
k
17
^
i
+
9
^
j
+
16
^
k
Validate
Solution:
👈: Video Solution
Given that torque,
→
τ
=
5
^
i
+
3
^
j
−
7
^
k
Position vector,
→
r
=
2
^
i
+
+
2
^
j
+
^
k
→
τ
=
→
r
×
→
F
=
|
i
j
k
2
2
1
5
3
−
7
|
=
^
i
(
−
14
−
3
)
−
^
j
(
−
14
−
5
)
+
^
k
(
6
−
10
)
=
−
17
^
i
+
19
^
j
−
4
^
k
© examsnet.com
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