Physics-
General
Easy
Question
A particle of mass m moving with horizontal speed
as shown in figure. If
than for one dimensional elastic collision, the speed of lighter particle after collision will be

in original direction
opposite to the original direction
opposite to the original direction
in original direction
The correct answer is:
in original direction


Substituting 

the lighter particle will move in original direction with the speed of 
Related Questions to study
Physics-
A particle of mass
attracted with a string of length
is just revolving on the vertical circle without slacking of the string. If
and
are speed at position
and
then

A particle of mass
attracted with a string of length
is just revolving on the vertical circle without slacking of the string. If
and
are speed at position
and
then

Physics-General
physics-
A simple pendulum is released from
as shown. If
and
represent the mass of the bob and length of the pendulum, the gain in kinetic energy at
is

A simple pendulum is released from
as shown. If
and
represent the mass of the bob and length of the pendulum, the gain in kinetic energy at
is

physics-General
Maths-
P(θ) and
are the pts. on the ellipse
then 
P(θ) and
are the pts. on the ellipse
then 
Maths-General
physics-
A ball of mass
rests on a vertical post of height
. A bullet of mass
, travelling with a velocity
in a horizontal direction, hits the centre of the ball. After the collision, the ball and bullet travel independently. The ball hits the ground at a distance of
and the bullet at a distance of
from the foot of the post. The initial velocity
of the bullet is

A ball of mass
rests on a vertical post of height
. A bullet of mass
, travelling with a velocity
in a horizontal direction, hits the centre of the ball. After the collision, the ball and bullet travel independently. The ball hits the ground at a distance of
and the bullet at a distance of
from the foot of the post. The initial velocity
of the bullet is

physics-General
physics-
A particle
is sliding down a frictionless hemispherical bowl. It passes the point
at
. At this instant of time, the horizontal component of its velocity
. A bead
of the same mass as
is ejected from
to
along the horizontal string
(see figure) with the speed
. Friction between the bead and the string may be neglected. Let
and
be the respective time taken by
and
to reach the point
. Then
A particle
is sliding down a frictionless hemispherical bowl. It passes the point
at
. At this instant of time, the horizontal component of its velocity
. A bead
of the same mass as
is ejected from
to
along the horizontal string
(see figure) with the speed
. Friction between the bead and the string may be neglected. Let
and
be the respective time taken by
and
to reach the point
. Then
physics-General
Maths-
If the chords of contact of
and
w.r.t the ellipse
are at right angle then 
If the chords of contact of
and
w.r.t the ellipse
are at right angle then 
Maths-General
Maths-
The area of an ellipse is 8π sq. units dist. between the foci is
then e=
The area of an ellipse is 8π sq. units dist. between the foci is
then e=
Maths-General
Physics-
A point
moves in counter-clockwise direction on a circular path as shown in the figure. The movement of
is such that it sweeps out a length
, where
is in metres and
is in seconds. The radius of the path is
. The acceleration of
when
is nearly

A point
moves in counter-clockwise direction on a circular path as shown in the figure. The movement of
is such that it sweeps out a length
, where
is in metres and
is in seconds. The radius of the path is
. The acceleration of
when
is nearly

Physics-General
physics-
In a two dimensional motion of a particle, the particle moves from point
, position vector
. If the magnitudes of these vectors are respectively,
=3 and
and the angles they make with the
-axis are
and 15
, respectively, then find the magnitude of the displacement vector

In a two dimensional motion of a particle, the particle moves from point
, position vector
. If the magnitudes of these vectors are respectively,
=3 and
and the angles they make with the
-axis are
and 15
, respectively, then find the magnitude of the displacement vector

physics-General
physics-
A block(B) is attached to two unstretched springs
with springs constants
representively (see Fig. I) The other ends are attached to identical supports
and
not attached to the walls. The springs and supports have negligible mass. There is no friction anywhere. The block
is displaced towards wall I by small distance
and released. The block returns and moves a maximum distance y towards wall 2.Displacements
are measured with respect to the equilibrium position of the block
The ratio
is

A block(B) is attached to two unstretched springs
with springs constants
representively (see Fig. I) The other ends are attached to identical supports
and
not attached to the walls. The springs and supports have negligible mass. There is no friction anywhere. The block
is displaced towards wall I by small distance
and released. The block returns and moves a maximum distance y towards wall 2.Displacements
are measured with respect to the equilibrium position of the block
The ratio
is

physics-General
physics-
A small roller coaster starts at point A with a speed
on a curved track as shown in the figure.
The friction between the roller coaster and the track is negligible and it always remains in contact with the track. The speed of roller coaster at point
on the track will be

A small roller coaster starts at point A with a speed
on a curved track as shown in the figure.
The friction between the roller coaster and the track is negligible and it always remains in contact with the track. The speed of roller coaster at point
on the track will be

physics-General
Physics-
A body of mass
is moving with a uniform speed
along a circle of radius
, what is the average acceleration in going from
to
?
A body of mass
is moving with a uniform speed
along a circle of radius
, what is the average acceleration in going from
to
?
Physics-General
physics-
A body of mass
is moving with a uniform speed of
on friction less surface under the influence of two forces
and
. The net power of the system is

A body of mass
is moving with a uniform speed of
on friction less surface under the influence of two forces
and
. The net power of the system is

physics-General
physics-
From an inclined plane two particles are projected with same speed at same angle
, one up and other down the plane as shown in figure, which of the following statements is/are correct?

From an inclined plane two particles are projected with same speed at same angle
, one up and other down the plane as shown in figure, which of the following statements is/are correct?

physics-General
physics-
A particle of a mass
is subjected to a force which varies with distance as shown in fig. If it starts its journey from rest at
, its velocity at
is

A particle of a mass
is subjected to a force which varies with distance as shown in fig. If it starts its journey from rest at
, its velocity at
is

physics-General