Physics-
General
Easy
Question
A sphere S rolls without slipping, moving with a constant speed on a plank P. The friction between the upper surface of P and the sphere is sufficient to prevent slipping, while the lower surface of P is smooth and rests on the ground. Initially, P is fixed to the ground by a pin T. If T is suddenly removed-
- S will begin to slip on P
- P will begin to move backwards
- the speed of S will decrease, and its angular velocity will increase
- there will be no change in the motion of S and P will still be at rest
The correct answer is: there will be no change in the motion of S and P will still be at rest
Related Questions to study
physics-
An equilateral prism of mass m rests on a rough horizontal surface with coefficient of friction 
. A horizontal force F is applied on the prism as shown in the figure. If the coefficient of friction is sufficiently high so that the prism does not slide before toppling, then the minimum force required to topple the prism is-
An equilateral prism of mass m rests on a rough horizontal surface with coefficient of friction . A horizontal force F is applied on the prism as shown in the figure. If the coefficient of friction is sufficiently high so that the prism does not slide before toppling, then the minimum force required to topple the prism is-
physics-General
physics-
A uniform rod of mass M and length L lies radially on a disc rotating with angular speed w in a horizontal plane about its axis. The rod does not slip on the disc and the centre of the rod is at a distance R from the centre of the disc. Then the kinetic energy of the rod is-
A uniform rod of mass M and length L lies radially on a disc rotating with angular speed w in a horizontal plane about its axis. The rod does not slip on the disc and the centre of the rod is at a distance R from the centre of the disc. Then the kinetic energy of the rod is-
physics-General
physics-
A uniform rod AB of mass m and length 
at rest on a smooth horizontal surface. An impulse P is applied to the end B. The time taken by the rod to turn through a right angle is :-
A uniform rod AB of mass m and length at rest on a smooth horizontal surface. An impulse P is applied to the end B. The time taken by the rod to turn through a right angle is :-
physics-General
physics-
A thin rod of length 4, mass 4m is bent at the points as shown in the fig. What is the moment of inertia of the rod about the axis passing point O & perpendicular to the plane of the paper
A thin rod of length 4, mass 4m is bent at the points as shown in the fig. What is the moment of inertia of the rod about the axis passing point O & perpendicular to the plane of the paper
physics-General
physics-
A smooth tube of certain mass is rotated in gravity free space and released. The two balls shown in the figure move towards ends of the tube. For the whole system which of the following quantity is not conserved :-
A smooth tube of certain mass is rotated in gravity free space and released. The two balls shown in the figure move towards ends of the tube. For the whole system which of the following quantity is not conserved :-
physics-General
physics-
A solid sphere is rolling on a frictionless surface, shown in figure with a translational velocity v m/s. If it is to climb the inclined surface then v should be:
A solid sphere is rolling on a frictionless surface, shown in figure with a translational velocity v m/s. If it is to climb the inclined surface then v should be:
physics-General
physics-
A rod hinged at one end is released from the horizontal position as shown in the figure. When it becomes vertical its lower half separates without exerting any reaction at the breaking point. Then the maximum angle ' ' q made by the hinged upper half with the vertical is
A rod hinged at one end is released from the horizontal position as shown in the figure. When it becomes vertical its lower half separates without exerting any reaction at the breaking point. Then the maximum angle ' ' q made by the hinged upper half with the vertical is
physics-General
physics-
A disc of mass M and radius R rolls on a horizontal surface and then rolls up an inclined plane as shown in the figure. If the velocity of the disc is v, the height to which the disc will rise will be :–
A disc of mass M and radius R rolls on a horizontal surface and then rolls up an inclined plane as shown in the figure. If the velocity of the disc is v, the height to which the disc will rise will be :–
physics-General
chemistry-
The reaction of 
with HBr gives
The reaction of with HBr gives
chemistry-General
General
The line parallel to the x-axis and passing through the intersection of the lines 
where 
is
In this question, we have to find the lines where it lies and what’s its distance from x-axis. If u=ax1+by1+c1=0 and v=ax2+by2+c2=0 are two intersecting lines, then the equation u + kv =0 represents a family of lines. Remember the family of lines
The line parallel to the x-axis and passing through the intersection of the lines where is
GeneralGeneral
In this question, we have to find the lines where it lies and what’s its distance from x-axis. If u=ax1+by1+c1=0 and v=ax2+by2+c2=0 are two intersecting lines, then the equation u + kv =0 represents a family of lines. Remember the family of lines
maths-
Distance between the two parallel lines 
and 
is
Distance between the two parallel lines and is
maths-General
chemistry-
When propionic acid is treated with aqueous sodium bicarbonate is liberated. The ‘C’ of CO2 comes from
When propionic acid is treated with aqueous sodium bicarbonate is liberated. The ‘C’ of CO2 comes from
chemistry-General
chemistry-
The following compound is used as
The following compound is used as
chemistry-General
physics-
In the reaction, product P is
In the reaction, product P is
physics-General
chemistry-
The compound X in the reaction
is
The compound X in the reaction
is
chemistry-General
