# Mb? + ML' sin*B mb? + ML sin*B 2MGL(sin a

## Expert Answer

Get this answer with Solutioninn Study

mb? + ML' sin*B
mb? + ML sin*B
2MGL(sin a – sinß)
3)ь,
mb? + ML cos*B
MgL(sina- sin ß)
4)b,
mb? + ML cos* B
28.
Precession is the result of the angular velocity of rotation (spin) and the angular
velocity produced by the torque. It is an angular velocity about a line that makes
an angle 0 with the permanent rotation axis. In the diagram, a top of mass m is
performing precession motion. The torque due to gravitational force causes a
change in the angular momentum L in the direction of that torque causing the top
to process with angular velocity »,
which is given by:
(Given r is distance of COM from point of rotation 'P'. I, & o, are the moment of
inertia and angular velocity of top about spin axis respectively)Given(@, >> o,)
Sec: Jr.Super60
Space for Rough Work
Page 7
Sri Chaitanya IIT Academy
19-09-2020_Jr.Super60(In Com)_Jee-Main_UTM-06_Q.P
Precession axis
L Spincaxis
3mgr
1).
2mgr
mgr
mgr
20,1s
ring of radius R is rolling purely on the outer surface of a fixed pipe of radius 4R.
At some instant, the center of the ring has a constant speed equal to V. Then, the
acceleration of the point on the ring, which is in contact with the surface of the
pipe is
R
4R
fixed pipe
)4V? / 5R
2)3V? / 5R
3) V? / 4R
zero
A merry-go-round, made of a ring-like platform of radius Rand mass M, is
revolving with angular speed o. A person of mass M is standing on it. At one
instant, the person jumps off the round, radially away from the centre of the round
(as seen from the round). The speed of the round afterwards is
1)20
3)
4)0
Sec: Jr.Super60
Space for Rough Work
Page 8
2973 0