Physics-
General
Easy
Question
Two identical masses 
and 
are hanging stationary by a light pulley (shown in the figure). A shell 
moving upwards with velocity 
collides with the block and gets stick to it. Then
- First string becomes slack and after some time becomes taut
- The momentum conservation principle is applicable to and
- The string becomes taut only when down displacement of combined mass and is occurred
- Both (a) and (b) are correct
and
and is occurred
The correct answer is: Both (a) and (b) are correct
When collides with then due to impulsive force, combined mass (
) starts to move upward. Consequently the string becomes slack
Related Questions to study
physics-
In the given figure four identical spheres of equal mass 
are suspended by wires of equal length 
, so that all spheres are almost touching to each other. If the sphere 1 is released from the horizontal position and all collisions are elastic, the velocity of sphere 4 just after collision is
In the given figure four identical spheres of equal mass are suspended by wires of equal length , so that all spheres are almost touching to each other. If the sphere 1 is released from the horizontal position and all collisions are elastic, the velocity of sphere 4 just after collision is
physics-General
physics-
Two negatively charges particles having charges 
and 
and masses 
and 
respectively are projected one after another into a region with equal initial velocity. The electric field 
is along the 
-axis, while the direction of projection makes an angle a with the -axis. If the ranges of the two particles along the 
-axis are equal then one can conclude that
Two negatively charges particles having charges and and masses and respectively are projected one after another into a region with equal initial velocity. The electric field is along the -axis, while the direction of projection makes an angle a with the -axis. If the ranges of the two particles along the -axis are equal then one can conclude that
physics-General
physics-
Two blocks and (
) are connected with a spring of force constant 
and are inclined at a angel 
with horizontal. If the system is released from rest, which one of the following statements is/are correct?
Two blocks and () are connected with a spring of force constant and are inclined at a angel with horizontal. If the system is released from rest, which one of the following statements is/are correct?
physics-General
physics-
In the given figure, two bodies of mass and are connected by massless spring of force constant and are placed on a smooth surface (shown in figure), then
In the given figure, two bodies of mass and are connected by massless spring of force constant and are placed on a smooth surface (shown in figure), then
physics-General
chemistry-
Which of the following noble gas was reacted with 
by Bartlett to prepare the first noble gas compounds -
Which of the following noble gas was reacted with by Bartlett to prepare the first noble gas compounds -
chemistry-General
physics-
A set of 
identical cubical blocks lies at rest parallel to each other along a line on a smooth horizontal surface. The separation between the near surfaces of any two adjacent blocks is 
. The block at one end is given a speed towards the next one at time 
. All collision are completely elastic. Then
A set of identical cubical blocks lies at rest parallel to each other along a line on a smooth horizontal surface. The separation between the near surfaces of any two adjacent blocks is . The block at one end is given a speed towards the next one at time . All collision are completely elastic. Then
physics-General
physics-
The blocks and , each of mass , are connected by massless spring of natural length and spring constant . The blocks are initially resting on a smooth horizontal floor with the spring at its natural length, as shown in figure. A third identical block , also of mass , moves on the floor with a speed along the line joining and , and collides with . Then
The blocks and , each of mass , are connected by massless spring of natural length and spring constant . The blocks are initially resting on a smooth horizontal floor with the spring at its natural length, as shown in figure. A third identical block , also of mass , moves on the floor with a speed along the line joining and , and collides with . Then
physics-General
physics-
Find the velocity of centre of the system shown in the figure.
Find the velocity of centre of the system shown in the figure.
physics-General
physics-
Two blocks and are connected by a massless string (shown in figure). A force of 30 N is applied on block . The distance travelled by centre of mass in 2 s starting from rest is
Two blocks and are connected by a massless string (shown in figure). A force of 30 N is applied on block . The distance travelled by centre of mass in 2 s starting from rest is
physics-General
physics-
Three rods of the same mass are placed as shown in figure. What will be the coordinates of centre of mass of the system?
Three rods of the same mass are placed as shown in figure. What will be the coordinates of centre of mass of the system?
physics-General
maths-
If 
then descending order of 
is
If then descending order of
is
maths-General
physics-
A disc is rolling (without slipping) on a horizontal surface is its centre and 
and 
are two points equidistant from . Let 
, 
and 
be the magnitude of velocities of pints 
and respectively, then
A disc is rolling (without slipping) on a horizontal surface is its centre and and are two points equidistant from . Let , and be the magnitude of velocities of pints and respectively, then
physics-General
Physics-
The acceleration of the center of mass of a uniform solid disc rolling down an inclined plane of angle 
is
The acceleration of the center of mass of a uniform solid disc rolling down an inclined plane of angle is
Physics-General
Physics-
A solid sphere of mass rolls down an inclined plane without slipping, starting from rest at the top of an inclined plane. The linear speed of the sphere at the bottom of the inclined plane is . The kinetic energy of the sphere at the bottom is
A solid sphere of mass rolls down an inclined plane without slipping, starting from rest at the top of an inclined plane. The linear speed of the sphere at the bottom of the inclined plane is . The kinetic energy of the sphere at the bottom is
Physics-General
Physics-
The moments of inertia of two freely rotating bodies and are 
and 
respectively. 
and their angular momenta are equal. If 
and 
are their kinetic energies, then
The moments of inertia of two freely rotating bodies and are and respectively. and their angular momenta are equal. If and are their kinetic energies, then
Physics-General
