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Shubhrajyoti Ghosh
Subject: Physics
, asked on 1/9/17
No links please
Q.3. A wheel of mass M, rotating on a vertical plane, can roll down an incline, of inclination
θ
. Prove that, if a body of mass m is attached to its circumference, the wheel will remain in equilibrium if
sin
θ
≤
m
m
+
M
.
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 1/9/17
No links please
Q.12. A horizontal square table is standing on four legs fitted at the mid-point of each side. Weight of the table is W. What maximum weight can be placed at any corner of the table, so that it does not overturn.
[W]
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 1/9/17
Solve:
No links please
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 1/9/17
Solve:
No links please
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 1/9/17
No links please
Q.8. On application of a force of
i
^
+
j
^
+
k
^
units on a particle, it changed its position from
i
^
+
j
^
t
o
j
^
-
k
^
. Find the work done.
[2 units]
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 1/9/17
No links please
Q.7. A person is standing on a road with his open umbrella at 30
°
with the vertical to save himself from wetting. Then he throws his umbrella and starts running at 5 km .
h
-
1
. Now he finds that rain drops are hitting his head vertically. Find the speed of rain drops w.r.t (i) road, (ii) the moving person.
[10 km.
h
-
1
, 5
3
km.
h
-
1
]
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 1/9/17
Solve:
No links please
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 1/9/17
No links please
Q.5. A vehicle was moving at 32 km •
h
-
1
towards north. A passenger noticed that rain was striking his body from the east. When the velocity of the vehicle was increased to 64 km •
h
-
1
, rain appeared to come from the north-east direction. Find the actual velocity and direction of rain.
[from south-east direction at 32
2
km •
h
-
1
velocity]
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 1/9/17
Two billiard balls are rolling on a flat table one has the velocity components
v
x
=
1
m
.
s
-
1
,
v
y
=
3
m
.
s
-
1
and the other has components
v
x
'
=
2
m
.
s
-
1
and
v
y
'
=
2
m
.
s
-
1
. If both the balls start moving from the same point, what is the angle between their paths?
Answer
1
Abhiram Sankar
Subject: Physics
, asked on 31/8/17
A bar magnet makes 30 vibrations in 60 sec, when B
H
= 1.8*10
–5
T. If it takes 1.6 secs to complete a vibration, find the new B
H
Answer
1
Prince Second
Subject: Physics
, asked on 31/8/17
Diamagnetic substances doesn't get magnetised when placed in external magnetic field? Is it because of paired electrons cancel each other's motional emf, or is it due to the external magnetic field is cancelled by the electrons?
Answer
2
Abhiram Sankar
Subject: Physics
, asked on 30/8/17
A bar magnet makes 30 vibrations in 60 sec, when B
H
= 1.8*10
-5
T. If it takes 1.6 secs to complete a vibration, find the new B
H
Answer
1
Abhiram Sankar
Subject: Physics
, asked on 29/8/17
A wheel with 10 metallic spokes, each 0.50 m long is rotated with a speed of 120 rpm in a plane normal to the earth's magnetic field of 0.4 G. What is the induced emf produced between the the axle and rim?
[NO LINKS PLEASE]
Answer
1
Deepshika Subramani
Subject: Physics
, asked on 29/8/17
pls explain dynamo effect in detail
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 27/8/17
No links please
Answer
1
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What are you looking for?
Q.3. A wheel of mass M, rotating on a vertical plane, can roll down an incline, of inclination . Prove that, if a body of mass m is attached to its circumference, the wheel will remain in equilibrium if .
Q.12. A horizontal square table is standing on four legs fitted at the mid-point of each side. Weight of the table is W. What maximum weight can be placed at any corner of the table, so that it does not overturn.
[W]
No links please
No links please
Q.8. On application of a force of units on a particle, it changed its position from . Find the work done.
[2 units]
Q.7. A person is standing on a road with his open umbrella at 30 with the vertical to save himself from wetting. Then he throws his umbrella and starts running at 5 km . . Now he finds that rain drops are hitting his head vertically. Find the speed of rain drops w.r.t (i) road, (ii) the moving person.
[10 km. , 5 km. ]
Q.5. A vehicle was moving at 32 km • towards north. A passenger noticed that rain was striking his body from the east. When the velocity of the vehicle was increased to 64 km • , rain appeared to come from the north-east direction. Find the actual velocity and direction of rain.
[from south-east direction at 32 km • velocity]
[NO LINKS PLEASE]