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Hermoine
Subject: Physics
, asked on 18/3/18
Please explain with steps
Q14. A body weighs 6 g when placed in one pan and 24 g when placed on the other pan of a false balance. If the beam is horizontal when both the pans are empty, find the true weight of the body.
Answer
1
Raj Aryan
Subject: Physics
, asked on 18/3/18
Solve this:
Q.4. A uniform cube of side l and mass m rests on a rough horizontal table. A horizontal force F is applied normal to one of the faces at a point that is directly above the center of the face at a height 3l/4 above the base. Assuming that the cube may tip about an edge without slipping, find the angular acceleration of the cube when F is equal to (a) mg/3. and (b) mg.
Answer
1
Aviral
Subject: Physics
, asked on 17/3/18
Solve this:
Q.51. Two identical uniform bricks of length L are placed in a stack over the edge of a horizontal surface with the maximum overhang possible without falling, as in figure. Find the distance x.
Answer
1
Hermoine
Subject: Physics
, asked on 16/3/18
The uniform rod AB of mass
m
is released from rest when β = 60°. Assuming that the frictional force between end A and the surface is large enough to prevent sliding, determine (for the instant just after release
(A) the angular acceleration of the rod.
(B) the normal reaction and the friction force at A.
(C) the minimum value of µ, compatible with the described motion.
Answer
1
Hermoine
Subject: Physics
, asked on 16/3/18
I have a doubt in q7 part 2
Q17. A particle moves with deceleration along the circle of radius R so that at any moment of time its tangential and normal accelerations are equal in moduli. At the initial moment t = 0, the speed of the particle equals
v
0
+
then
(ii) the total acceleration of the particle as function of velocity and distance covered is given as
(A) a =
2
v
2
R
(B) a =
2
v
R
(C) a =
2
R
v
(D) a =
2
R
v
Answer
1
Ipsita Dash
Subject: Physics
, asked on 14/3/18
How would the angular velocity and time period of rotation of earth change if all the ice at the poles melts ? Justify your answer.
Answer
1
Hermoine
Subject: Physics
, asked on 14/3/18
Please help
Answer
1
Abhinav Chandran
Subject: Physics
, asked on 13/3/18
What are similarities between pure translational and pure rotational motion?
Answer
1
Shreya Choudhary
Subject: Physics
, asked on 11/3/18
Unable to understand point b and c
Answer
1
Shreya Choudhary
Subject: Physics
, asked on 11/3/18
How do u get v1^2+v2^2 as (1+e2)?4/2???
Q. 36 Let the final velocities of the blocks be v
1
and v
2
respectively.
The coefficient of restitution is e.
∴
T
h
e
l
o
s
s
i
n
K
.
E
.
i
s
g
i
v
e
n
b
y
,
1
2
×
2
×
2
2
-
1
2
2
×
v
1
2
-
⇒
4
-
V
1
2
+
V
2
2
=
1
⇒
4
-
1
+
e
2
×
4
2
=
1
⇒
2
(
1
+
e
2
)
=
3
⇒
1
+
e
2
=
3
2
⇒
e
2
=
1
2
⇒
e
=
1
2
Answer
1
Shreya Choudhary
Subject: Physics
, asked on 10/3/18
Q. A block of mass M is placed on the top of a bigger block of mass 10 M as shown in figure (9-W9). All the surfaces are frictionless. The system is released from rest. Find the distance moved by the bigger block at the instant the smaller block reaches the ground.
Answer
1
Shreya Choudhary
Subject: Physics
, asked on 10/3/18
Why they have taken distances x2-L/2
Answer
1
Sonali Hensh
Subject: Physics
, asked on 10/3/18
Explain how stationary waves are formed in open and close organ pipes .compare first three harmonic produced in them
Answer
1
Sonali Hensh
Subject: Physics
, asked on 10/3/18
Discuss newton's formula formula for the velocities of longitudinal waves in air what is the effect of change in temperature on it? Derive necessary formula.
Answer
1
Alok Singh
Subject: Physics
, asked on 6/3/18
Plot the graph between rotational Kinetic Energy and angular momentum.
Answer
1
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Q14. A body weighs 6 g when placed in one pan and 24 g when placed on the other pan of a false balance. If the beam is horizontal when both the pans are empty, find the true weight of the body.
Q.4. A uniform cube of side l and mass m rests on a rough horizontal table. A horizontal force F is applied normal to one of the faces at a point that is directly above the center of the face at a height 3l/4 above the base. Assuming that the cube may tip about an edge without slipping, find the angular acceleration of the cube when F is equal to (a) mg/3. and (b) mg.
Q.51. Two identical uniform bricks of length L are placed in a stack over the edge of a horizontal surface with the maximum overhang possible without falling, as in figure. Find the distance x.
(A) the angular acceleration of the rod.
(B) the normal reaction and the friction force at A.
(C) the minimum value of µ, compatible with the described motion.
Q17. A particle moves with deceleration along the circle of radius R so that at any moment of time its tangential and normal accelerations are equal in moduli. At the initial moment t = 0, the speed of the particle equals then
(ii) the total acceleration of the particle as function of velocity and distance covered is given as
(A) a = (B) a =
(C) a = (D) a =
Q. 36 Let the final velocities of the blocks be v1 and v2 respectively.
The coefficient of restitution is e.