Physics-
General
Easy
Question
A uniform circular disc of radius r is placed on a rough horizontal surface and given a linear velocity v0 and angular velocity w0 as shown. The disc comes to rest after moving some distance to the right. It follows that
- 3 v0 =
r
- 2 v0 =
r
- v0 = r
- 2 v0 = 3 r
r
r
r
r
The correct answer is: 2 v0 = r
Related Questions to study
Physics-
A thin rod of mass m and length 
is bent into a V-shaped frame at its mid point as shown in the figure. The moment of inertia of the system about an axis passing through O perpendicular to the plane of the frame is equal to
A thin rod of mass m and length is bent into a V-shaped frame at its mid point as shown in the figure. The moment of inertia of the system about an axis passing through O perpendicular to the plane of the frame is equal to
Physics-General
Physics-
A thin hollow sphere of mass m is completely filled with an ideal liquid of mass m. When the sphere rolls with a velocity v kinetic energy of the system is equal to
A thin hollow sphere of mass m is completely filled with an ideal liquid of mass m. When the sphere rolls with a velocity v kinetic energy of the system is equal to
Physics-General
Physics-
A triangular plate ABC is free to rotate about two points A and B on smooth horizontal floor. A force F is applied perpendicular to AB so as to rotate the plate about A and B separately. If a1 & a2 are the corresponding accelerations for the cases then 
will be
A triangular plate ABC is free to rotate about two points A and B on smooth horizontal floor. A force F is applied perpendicular to AB so as to rotate the plate about A and B separately. If a1 & a2 are the corresponding accelerations for the cases then will be
Physics-General
Physics-
A uniform solid circular cylinder of radius r is placed on a rough horizontal surface and given a linear velocity v = 2w0r and angular velocity w0 as shown in the figure. The speed of cylinder when it starts rolling
A uniform solid circular cylinder of radius r is placed on a rough horizontal surface and given a linear velocity v = 2w0r and angular velocity w0 as shown in the figure. The speed of cylinder when it starts rolling
Physics-General
Physics-
The ball A collides elastically with an identical ball B with a speed v. The ball B touches another identical ball C. The velocity of C, after the impact, is equal to
The ball A collides elastically with an identical ball B with a speed v. The ball B touches another identical ball C. The velocity of C, after the impact, is equal to
Physics-General
Physics-
The speed of the ball after the collision.
The speed of the ball after the collision.
Physics-General
Physics-
Two bodies of masses m1 and m2 are placed on a horizontal table with coefficient of friction m and are joined by a spring. Initially, the spring has its natural length. If F is minimum force which, when applied on m1, will make the other block m2 just move. (k is the spring constant) and x is elongation in spring at that instant.
Two bodies of masses m1 and m2 are placed on a horizontal table with coefficient of friction m and are joined by a spring. Initially, the spring has its natural length. If F is minimum force which, when applied on m1, will make the other block m2 just move. (k is the spring constant) and x is elongation in spring at that instant.
Physics-General
Physics-
A ball of mass 1 kg is thrown up with an initial speed of 4 m/s. A second ball of mass 2 kg is released from rest from some height as shown in the figure
A ball of mass 1 kg is thrown up with an initial speed of 4 m/s. A second ball of mass 2 kg is released from rest from some height as shown in the figure
Physics-General
Chemistry-
that can form cis-trans geometrical isomers and also has a chiral centre, is:
that can form cis-trans geometrical isomers and also has a chiral centre, is:
Chemistry-General
Chemistry-
The major product formed when a 3,3-dimethylbutan-2-ol is heated with concentrated sulphuric acid is
The major product formed when a 3,3-dimethylbutan-2-ol is heated with concentrated sulphuric acid is
Chemistry-General
Chemistry-
Which of the following will show geometrical isomerism?
Which of the following will show geometrical isomerism?
Chemistry-General
Chemistry-
How many structures of[F] is possible?
How many structures of[F] is possible?
Chemistry-General
Chemistry-
A compound with molecular formula C7H16 shows optical isomerism, the ,compound will be :
A compound with molecular formula C7H16 shows optical isomerism, the ,compound will be :
Chemistry-General
Chemistry-
The optically active tartaric acid is named as D-( + )-tartaric 'acid because it -has a positive:
The optically active tartaric acid is named as D-( + )-tartaric 'acid because it -has a positive:
Chemistry-General
Chemistry-
Which one is the correct statement?
Which one is the correct statement?
Chemistry-General
