the coefficient of friction
A ring of radius R is first rotated with an angular velocity ω0 and then carefully placed on a rough horizontal surface. The coefficient of friction between the surface and the ring is μ. Time after which its angular speed is reduced to half is
06
Dec
A ring of radius R is first rotated with an angular velocity ω0 and then carefully placed on a rough horizontal surface. The coefficient of friction between the surface and the ring is μ. Time after which its angular speed is reduced to half is If the normal force is doubled is the coefficient of [...]
A point mass m A is connected to a point mass mB by a mass less rod of length l as shown in the figure. It is observed that the ratio of the moment of inertia of the system about the two axes BB and AA, which is parallel to each and perpendicular to the rod, is IAA/Imm = 3. The distance of the centre of mass of the system from the mass A is
06
Dec
A point mass m A is connected to a point mass mB by a mass less rod of length l as shown in the figure. It is observed that the ratio of the moment of inertia of the system about the two axes BB and AA, which is parallel to each and perpendicular to the [...]
Initial angular velocity of a circular disc of mass M is ω1. Then two small spheres of mass m are attached gently to two diametrically opposite points on the edge of the disc. What is the final angular velocity of the disc ?
06
Dec
Initial angular velocity of a circular disc of mass M is ω1. Then two small spheres of mass m are attached gently to two diametrically opposite points on the edge of the disc. What is the final angular velocity of the disc ? If the normal force is doubled is the coefficient of friction December [...]
A uniform chain of length 2m is kept on a table such that a length of 60cm hangs freely from the edge of the table the table. The total mass of the chain is 4kg What is the work done in pulling the entire the chain the on the table ?
06
Dec
A uniform chain of length 2m is kept on a table such that a length of 60cm hangs freely from the edge of the table the table. The total mass of the chain is 4kg What is the work done in pulling the entire the chain the on the table ? If the normal force [...]
A wheel of radius 0.4m can rotate freely about its axis as shown in the figure. A string is wrapped over its rim and a mass of 4kg is hung. An angular acceleration of 8rad/s^2 is produced in it due to the torque. Then, the moment of inertia of the wheel is (g=10m/s^2)
06
Dec
A wheel of radius 0.4m can rotate freely about its axis as shown in the figure. A string is wrapped over its rim and a mass of 4kg is hung. An angular acceleration of 8rad/s^2 is produced in it due to the torque. Then, the moment of inertia of the wheel is (g=10m/s^2) If the [...]
Figure shows a small wheel fixed coaxially on a bigger one of the double the radius. The system rotates about the common axis. The strings supporting A and B do not slip on the wheels. If x and y be the distance travelled by A and B in the same time interval, then
06
Dec
Figure shows a small wheel fixed coaxially on a bigger one of the double the radius. The system rotates about the common axis. The strings supporting A and B do not slip on the wheels. If x and y be the distance travelled by A and B in the same time interval, then If the [...]
Two fixed frictionless inclined plane making angles 30∘ and 60∘ with the vertical are shown in the figure. Two blocks A and B are placed on the two planes What is the relative vertical acceleration of A with respect to B ?
06
Dec
Two fixed frictionless inclined plane making angles 30∘ and 60∘ with the vertical are shown in the figure. Two blocks A and B are placed on the two planes What is the relative vertical acceleration of A with respect to B ? If the normal force is doubled is the coefficient of friction December 6, [...]
An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. The first part of mass 1 kg moves with a speed of 12ms^−1 and the second part of mass 2 kg moves with 8ms^−1 speed. If the third part flies off with 4ms^−1 speed, then its mass is
06
Dec
An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. The first part of mass 1 kg moves with a speed of 12ms^−1 and the second part of mass 2 kg moves with 8ms^−1 speed. If the third part flies off with [...]
One end of massless rope, which passes over a massless and frictionless pulley P is tied to a hook C while the other end is free. Maximum tension that the rope can bear is 360 N. With what value of maximum safe acceleration (in ms^−2 ) can a man of 60 kg climb on the rope?
06
Dec
One end of massless rope, which passes over a massless and frictionless pulley P is tied to a hook C while the other end is free. Maximum tension that the rope can bear is 360 N. With what value of maximum safe acceleration (in ms^−2 ) can a man of 60 kg climb on the [...]
A body is allowed to slide down a frictionless track freely under gravity. The track end in a semicircular shaped part of a diameter O. The height (minimum) from which the body must fall so that it completes the circle ?
06
Dec
A body is allowed to slide down a frictionless track freely under gravity. The track end in a semicircular shaped part of a diameter O. The height (minimum) from which the body must fall so that it completes the circle ? If the normal force is doubled is the coefficient of friction December 6, 2020 [...]