Physics-
The trajectory of a particle moving in vast maidan is as shown in the figure. The coordinates of a position 
are 
The coordinates of another point at which the instantaneous velocity is same as the average velocity between the points are
Physics-General
Answer:The correct answer is:
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physics-
Two small particles of equal masses start moving in opposite directions from a point A in a horizontal circular orbit. Their tangential velocities are 
respectively, as shown in the figure. Between collisions, the particles move with constant speeds. After making how many elastic collisions, other than that at 
,these two particles will again reach The point 
A s first collision one particle having speed 2v will rotate
while other particle having speed 
will rotate
At first collision they will exchange their velocities. Now as shown in figure, after two collisions they will again reach at point A.
while other particle having speed will rotate At first collision they will exchange their velocities. Now as shown in figure, after two collisions they will again reach at point A.Two small particles of equal masses start moving in opposite directions from a point A in a horizontal circular orbit. Their tangential velocities are respectively, as shown in the figure. Between collisions, the particles move with constant speeds. After making how many elastic collisions, other than that at ,these two particles will again reach The point
physics-General
A s first collision one particle having speed 2v will rotate
while other particle having speed will rotate
At first collision they will exchange their velocities. Now as shown in figure, after two collisions they will again reach at point A.
while other particle having speed will rotate At first collision they will exchange their velocities. Now as shown in figure, after two collisions they will again reach at point A.physics-
The potential energy of a particle varies with distance 
as shown in the graph.
The force acting on the particle is zero at
it is clear that slope of 
curve is zero at point 
and 
for point and The potential energy of a particle varies with distance as shown in the graph.
The force acting on the particle is zero at
physics-General
it is clear that slope of curve is zero at point and for point and physics-
A 0.098 kg block slides down a frictionless track as shown. The vertical component of the velocity of block at is
or 
Vertical component at
A 0.098 kg block slides down a frictionless track as shown. The vertical component of the velocity of block at is
physics-General
or Vertical component at
chemistry-
Assertion :this equilibrium favours backward direction.
Reason :
is stronger base than 
Assertion :this equilibrium favours backward direction.
Reason :is stronger base than
chemistry-General
maths-
The number of rectangles in the adjoining figure is –
The number of rectangles in the adjoining figure is –
maths-General
maths-
The number of numbers between 1 and 1010 which contain the digit 1 is -
The number of numbers between 1 and 1010 which contain the digit 1 is -
maths-General
maths-
If n objects are arranged in a row, then the number of ways of selecting three of these objects so that no two of them are next to each other is -
If n objects are arranged in a row, then the number of ways of selecting three of these objects so that no two of them are next to each other is -
maths-General
maths-
Between two junction stations A and B there are 12 intermediate stations. The number of ways in which a train can be made to stop at 4 of these stations so that no two of these halting stations are consecutive is -
Between two junction stations A and B there are 12 intermediate stations. The number of ways in which a train can be made to stop at 4 of these stations so that no two of these halting stations are consecutive is -
maths-General
maths-
The number of non-negative integral solutions of x + y + z n, where n N is -
The number of non-negative integral solutions of x + y + z n, where n N is -
maths-General
maths-
In a model, it is shown that an arch of abridge is semi-elliptical with major axis horizontal. If the length of the base is 9 m and the highest part of the bridge is 3 m from the horizontal, the best approximation of the height of the arch, 2 m from the centre of the base is
In a model, it is shown that an arch of abridge is semi-elliptical with major axis horizontal. If the length of the base is 9 m and the highest part of the bridge is 3 m from the horizontal, the best approximation of the height of the arch, 2 m from the centre of the base is
maths-General
physics-
A 
mass moves along -axis. Its acceleration as a function of its position is shown in the figure. What is the total work done on the mass by the force as the mass moves from 
to 
Work done = Area covered in between force displacement curve and displacement axis
= Mass
Area covered in between acceleration-displacement curve and displacement axis
= Mass
Area covered in between acceleration-displacement curve and displacement axisA mass moves along -axis. Its acceleration as a function of its position is shown in the figure. What is the total work done on the mass by the force as the mass moves from to
physics-General
Work done = Area covered in between force displacement curve and displacement axis
= MassArea covered in between acceleration-displacement curve and displacement axis
= Mass
Area covered in between acceleration-displacement curve and displacement axisphysics-
A mass 
slips along the wall of a semispherical surface of radius 
. The velocity at the bottom of the surface is
By applying law of conservation of energy
A mass slips along the wall of a semispherical surface of radius . The velocity at the bottom of the surface is
physics-General
By applying law of conservation of energy
physics-
Three forces of magnitudes 6N, 6N and 
N at a corner of a cube along three sides as shown in figure. Resultant of these forces is
The resultant of 5 N along 
and 5 N along 
is
N along 
The resultant of N along and N along 
is
N along 
.
and 5 N along isN along The resultant of
N along and N along isN along .Three forces of magnitudes 6N, 6N and N at a corner of a cube along three sides as shown in figure. Resultant of these forces is
physics-General
The resultant of 5 N along and 5 N along is
N along
The resultant of N along and N along is
N along .
and 5 N along isN along The resultant of
N along and N along isN along .physics-
Two small particles of equal masses start moving in opposite directions from a point in a horizontal circular orbit. Their tangential velocities are 
and 
, respectively, as shown in the figure. Between collisions, the particles move with constant speeds. After making how many elastic collisions, other than that at , these two particles will again reach the point
Let initially particle is moving in anticlockwise direction and 
in clockwise direction
As the ratio of velocities ofand particles are 
, therefore ratio of their distance covered will be in the ratio of 
. It means they collide at point B
After first collision at B, velocities of particles get interchanged,
., will move with and particle with
Second collision will take place at point C. Again at this point velocities get interchanged and third collision take place at point A
So, after two collision these two particles will again reach the point A
is moving in anticlockwise direction and in clockwise directionAs the ratio of velocities of
and particles are , therefore ratio of their distance covered will be in the ratio of . It means they collide at point BAfter first collision at B, velocities of particles get interchanged,
., will move with and particle with Second collision will take place at point C. Again at this point velocities get interchanged and third collision take place at point A
So, after two collision these two particles will again reach the point A
Two small particles of equal masses start moving in opposite directions from a point in a horizontal circular orbit. Their tangential velocities are and , respectively, as shown in the figure. Between collisions, the particles move with constant speeds. After making how many elastic collisions, other than that at , these two particles will again reach the point
physics-General
Let initially particle is moving in anticlockwise direction and in clockwise direction
As the ratio of velocities ofand particles are , therefore ratio of their distance covered will be in the ratio of . It means they collide at point B
After first collision at B, velocities of particles get interchanged,., will move with and particle with
Second collision will take place at point C. Again at this point velocities get interchanged and third collision take place at point A
So, after two collision these two particles will again reach the point A
is moving in anticlockwise direction and in clockwise directionAs the ratio of velocities of
and particles are , therefore ratio of their distance covered will be in the ratio of . It means they collide at point BAfter first collision at B, velocities of particles get interchanged,
., will move with and particle with Second collision will take place at point C. Again at this point velocities get interchanged and third collision take place at point A
So, after two collision these two particles will again reach the point A
physics-
A man standing on a hill top projects a stone horizontally with speed 
as shown in figure. Taking the coordinate system as given in the figure. The coordinates of the point where the stone will hit the hill surface
Range of the projectile on an inclined plane (down the plane) is,
Here,
and 
Now
and
Here,
and Now
and
A man standing on a hill top projects a stone horizontally with speed as shown in figure. Taking the coordinate system as given in the figure. The coordinates of the point where the stone will hit the hill surface
physics-General
Range of the projectile on an inclined plane (down the plane) is,
Here, and
Now
and
Here,
and Now
and