Physics-
General
Easy
Question
For a particle moving on a straight line the variation of acceleration with time is given by the graph as shown. Initially the particle was at rest. Then the corresponding kinetic energy of the particle versus time graph will be
The correct answer is:
Related Questions to study
physics-
In the figure the variation of components of acceleration of a particle of mass 1 kg is shown w.r.t. time. The initial velocity of the particle is 
m/s. The total work done by the resultant force on the particle in time interval from t = 0 to t = 4 seconds is :
In the figure the variation of components of acceleration of a particle of mass 1 kg is shown w.r.t. time. The initial velocity of the particle is m/s. The total work done by the resultant force on the particle in time interval from t = 0 to t = 4 seconds is :
physics-General
physics-
A collar ‘B’ of mass 2 kg is constrained to move along a horizontal smooth and fixed circular track of radius 5 m. The spring lying in the plane of the circular track and having spring constant 200 N/m is undeformed when the collar is at ‘A’. If the collar starts from rest at ‘B’, the normal reaction exerted by the track on the collar when it passes through ‘A’ is :
A collar ‘B’ of mass 2 kg is constrained to move along a horizontal smooth and fixed circular track of radius 5 m. The spring lying in the plane of the circular track and having spring constant 200 N/m is undeformed when the collar is at ‘A’. If the collar starts from rest at ‘B’, the normal reaction exerted by the track on the collar when it passes through ‘A’ is :
physics-General
physics-
The blocks A and B shown in the figure have masses 
= 5 kg and 
= 4 kg. The system is released from rest. The speed of B after A has travelled a distance 1 m along the incline is
The blocks A and B shown in the figure have masses = 5 kg and = 4 kg. The system is released from rest. The speed of B after A has travelled a distance 1 m along the incline is
physics-General
physics-
An infinitely long straight conductor 
is fixed and a current is passed through it. Another movable straight wire 
of finite length and carrying current is held perpendicular to it and released. Neglect weight of the wire
An infinitely long straight conductor is fixed and a current is passed through it. Another movable straight wire of finite length and carrying current is held perpendicular to it and released. Neglect weight of the wire
physics-General
physics-
A wire shown in figure carries a current of 40 A. If 
, the magnetic field at point 
will be
A wire shown in figure carries a current of 40 A. If , the magnetic field at point will be
physics-General
physics-
and 
are long parallel conductors separated by certain distance. 
is the mid-point between them (see the figure). The net magnetic field at is 
. Now, the current 2 A is switched off. The field at now becomes
and are long parallel conductors separated by certain distance. is the mid-point between them (see the figure). The net magnetic field at is . Now, the current 2 A is switched off. The field at now becomes
physics-General
physics-
The figure shows the cross-section of a long cylindrical conductor of radius 
carrying a uniformly distributed current 
The magnetic field due to current at is
The figure shows the cross-section of a long cylindrical conductor of radius carrying a uniformly distributed current The magnetic field due to current at is
physics-General
chemistry-
Which of the following compounds is resistant to nucleophilic attack by hydroxyl ions?
Which of the following compounds is resistant to nucleophilic attack by hydroxyl ions?
chemistry-General
chemistry-
The boiling point of ethyl alcohol is much higher than that of dimethyl ether and 
, though both have the same molecular weight. The reason for this is:
The boiling point of ethyl alcohol is much higher than that of dimethyl ether and , though both have the same molecular weight. The reason for this is:
chemistry-General
physics-
Two identical bar magnets are fixed with their centres at a distance d apart. A stationary charge 
is placed at in between the gap of the two magnets at a distance 
from the centre 
as shown in the figure 
The force on the charge is
Two identical bar magnets are fixed with their centres at a distance d apart. A stationary charge is placed at in between the gap of the two magnets at a distance from the centre as shown in the figure The force on the charge is
physics-General
physics-
Consider a disc rotating in the horizontal plane with a constant angular speed w about its centre O. The disc has a shaded region on one side of the diameter and an unshaded region on the other side as shown in the figure. When the disc is in the orientation as shown, two pebbles P and Q are simultaneously projected at an angle towards R. The velocity of projection is in the y-z plane and is same for both pebbles with respect to the disc. Assume that (i) they land back on the disc before the disc has completed 1/8 rotation, (ii) their range is less than half the disc radius, and (iii) w remains constant throughout. Then
Consider a disc rotating in the horizontal plane with a constant angular speed w about its centre O. The disc has a shaded region on one side of the diameter and an unshaded region on the other side as shown in the figure. When the disc is in the orientation as shown, two pebbles P and Q are simultaneously projected at an angle towards R. The velocity of projection is in the y-z plane and is same for both pebbles with respect to the disc. Assume that (i) they land back on the disc before the disc has completed 1/8 rotation, (ii) their range is less than half the disc radius, and (iii) w remains constant throughout. Then
physics-General
physics-
A ball of mass (m) 0.5 kg is attached to the end of a string having length (L) 0.5 m. The ball is rotated on a horizontal circular path about vertical axis. The maximum tension that the string can bear is 324 N. The maximum possible value of angular velocity of ball (in radian/s) is
A ball of mass (m) 0.5 kg is attached to the end of a string having length (L) 0.5 m. The ball is rotated on a horizontal circular path about vertical axis. The maximum tension that the string can bear is 324 N. The maximum possible value of angular velocity of ball (in radian/s) is
physics-General
physics-
A bob of mass M is suspended by a massless string of length L. The horizontal velocity v at position A is just sufficient to make it reach the point B. The angle 
at which the speed of the bob is half of that A, is
A bob of mass M is suspended by a massless string of length L. The horizontal velocity v at position A is just sufficient to make it reach the point B. The angle at which the speed of the bob is half of that A, is
physics-General
physics-
If 
, 
and 
represent the work done in moving a particle from A to B along three different paths 1, 2 and 3 respectively (as shown) in the gravitational field of a point mass m. Find the correct relation between , and
If , and represent the work done in moving a particle from A to B along three different paths 1, 2 and 3 respectively (as shown) in the gravitational field of a point mass m. Find the correct relation between , and
physics-General
physics-
Newton/meter2 is the unit of
Newton/meter2 is the unit of
physics-General
