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Manipal Entrance Test 2017 Physics Paper
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© examsnet.com
Question : 4
Total: 50
Three blocks of masses
m
1
,
m
2
and
m
3
are connected by massless string as shown kept on a frictionless table.
They are pulled with a force
T
3
=
40
N
.
If
m
1
=
10
kg
,
m
2
=
6
kg
and
m
3
=
4
kg
, the tension
T
2
will be
20
N
40
N
10
N
32
N
Validate
Solution:
Common acceleration
a
=
F
m
1
+
m
2
+
m
3
=
40
10
+
6
+
4
=
2
m
∕
s
2
Equation of motion of
m
3
is
T
3
−
T
2
=
m
3
a
40
−
T
2
=
4
×
2
⇒
T
2
=
32
N
© examsnet.com
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