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Hermoine
Subject: Physics
, asked on 9/2/18
Please help and give explanation
Answer
1
Krithikha B
Subject: Physics
, asked on 9/2/18
a cylinder mass 10 kg radius 15 cm rolling perfectly in a plane of inclination 30..the oceff of friction is 0.25.
how much is the frce of friction acting on the cylinder?
what is the work done against friction during rolling?
if inclination on plane is decreased , at what value of theta does cylinder begin to skid and roll perfectly?
Answer
1
Royel Ghost
Subject: Physics
, asked on 6/2/18
A particle of mass m is projected with a velocity of 15m/ s making an angle of 45 degree with the horizontal. The magnitude of the angular momentum of the projectile about the point of projections when the particle is at its maximum height is
Answer
1
Sanad
Subject: Physics
, asked on 29/1/18
what is the difference between translatory motion and rotatory motion?
Answer
2
Aqueel
Subject: Physics
, asked on 29/1/18
A person sitting firmly over a rotating stool has his arms stretched. If he folds his arms, his angular momentum about the axis of the rotation
Answer
1
Aqueel
Subject: Physics
, asked on 29/1/18
I am a paid user please answer fast I have exam
30P.
(a) Find the moment of inertia of a thin metre scale about a perpendicular axis through the centre. Take
M
as the mass of the scale.
(b) Find the moment of inertia of a thin circular disc of mass
m
and radius
R
about one of its diameters.
(c) If a student fixes two discs each of radius
R
at the ends of meter scale and rotates the system about an axis perpendicular to the length of the scale as in figure. What will be the moment of inertia of the system?
Answer
1
Ashish Singh
Subject: Physics
, asked on 28/1/18
what is popous theorem
Answer
2
Avinash R
Subject: Physics
, asked on 23/1/18
Derive an expression for centre of mass of 3 particle system
Answer
1
Rajib
Subject: Physics
, asked on 21/1/18
how v=root over[(2gh)/(1 + k^2/R^2)] was obtained?
Q7.18. A solid sphere rolls down two different inclined planes of the same heights but different angles of inclination. (a) Will it reach the bottom with the same speed in each case ? (b) Will it take longer to roll down one plane than the other ? (c) If so, which one and why ?
Ans
.
Acceleration
of
the
rolling
sphere
,
a
=
g
sin
θ
1
+
k
2
/
/
R
2
Velocity
of
the
sphere
at
the
bottom
of
the
inclined
plane
,
2
gh
1
+
k
2
/
R
2
Answer
1
Nandni Verma
Subject: Physics
, asked on 14/1/18
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Answer
1
Aishwarya
Subject: Physics
, asked on 14/1/18
Solve this:
Answer
2
Rajib
Subject: Physics
, asked on 9/1/18
Two thin circular discs of mass m and 4m,having radii a and 2a,respectively,are rigidly fixed by a massless,right rod of length l = root(24a) through their center. This assembly is laid on a firm and flat surface,and the set rolling without slipping on the surface so that the angular speed about the axis of rod is w . The angular momentum of the entire assembly about the point 'O' is L .Which statement is/are true??
a) the magnitude of angular momentum of the assembly about its center of mass is 17ma^2w/2?
b) The magitude of the z-component of L is 55 ma^2w?
c) The magnitude of angular momentum of center of mass of the assembly about the point O is 81 ma^2w?
d)The center of mass of the assembly rotates about the z-axis with an angular speed of w/5
Answer
1
Tanishka Gupta
Subject: Physics
, asked on 9/1/18
Que 4
Answer
1
Dhruvik Tandel
Subject: Physics
, asked on 7/1/18
dervire 2 nd law of newton(law of motion)????
Answer
1
Jaanvi Agarwal
Subject: Physics
, asked on 6/1/18
A fan rotating with 120 revolutions per minute is switched off. It stops in 10 seconds.Assuming its angular retardation to be uniform,calculate the number of rotations it will make in that time.
Answer
1
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What are you looking for?
how much is the frce of friction acting on the cylinder?
what is the work done against friction during rolling?
if inclination on plane is decreased , at what value of theta does cylinder begin to skid and roll perfectly?
30P. (a) Find the moment of inertia of a thin metre scale about a perpendicular axis through the centre. Take M as the mass of the scale.
(b) Find the moment of inertia of a thin circular disc of mass m and radius R about one of its diameters.
(c) If a student fixes two discs each of radius R at the ends of meter scale and rotates the system about an axis perpendicular to the length of the scale as in figure. What will be the moment of inertia of the system?
Q7.18. A solid sphere rolls down two different inclined planes of the same heights but different angles of inclination. (a) Will it reach the bottom with the same speed in each case ? (b) Will it take longer to roll down one plane than the other ? (c) If so, which one and why ?
a) the magnitude of angular momentum of the assembly about its center of mass is 17ma^2w/2?
b) The magitude of the z-component of L is 55 ma^2w?
c) The magnitude of angular momentum of center of mass of the assembly about the point O is 81 ma^2w?
d)The center of mass of the assembly rotates about the z-axis with an angular speed of w/5