A circular disc of radius R is removed from a bigger circular disc of radius 2R such that the circumferences of the discs coincide. The centre of mass of the new disc is from the centre of the bigger disc. What is the value of ?

Anonymous User Physics Circular and Rotational Motion 27 Mar, 2020 1 Answer 66 views


A thin circular ring of mass m and radius R is rotating about its axis with a constant angular velocity Two objects each of mass M are attached gently to the opposite ends of a diameter of the ring. The ring now rotates with an angular velocity

Anonymous User Physics Circular and Rotational Motion 27 Mar, 2020 1 Answer 74 views


Consider a two-particle system with particles having masses m1 and m2. If the first particle is pushed towards the centre of mass through a distance d, by what distance should the second particle be moved, so as to keep the centre of mass at the same position?

Anonymous User Physics Circular and Rotational Motion 27 Mar, 2020 1 Answer 59 views

A T shaped object with dimensions shown in the figure is lying on a smooth floor. A force F is applied at the point parallel to AB, such that the object has only the translational motion without rotation. What is the location of P with respect to C? 

Anonymous User Physics Circular and Rotational Motion 27 Mar, 2020 1 Answer 91 views

A thin rod of length L is lying along the x-­axis with its ends at x = 0 and x = L. Its linear density (mass/length) varies with x as k(x/L)n where n can be zero or any positive number. If the position xCM of the centre of mass of the rod is plotted against n, which of the following graphs best approximates the dependence of xCM on n?

Anonymous User Physics Circular and Rotational Motion 27 Mar, 2020 1 Answer 63 views






A circular disc X of radius R is made from an iron plate of thickness t, and another disc Y of radius 4R is made from an iron plate of thickness t/4. Then what is the relation between the moment of inertia Ix and Iy?

Anonymous User Physics Circular and Rotational Motion 25 Mar, 2020 1 Answer 61 views



A solid sphere, a hollow sphere and a ring are released from top of an inclined plane (frictionless) so that they slide down the plane. Then what is the maximum acceleration down the plane is for (no rolling)?

Anonymous User Physics Circular and Rotational Motion 25 Mar, 2020 1 Answer 75 views

Initial angular velocity of a circular disc of mass M is . 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?

Anonymous User Physics Circular and Rotational Motion 25 Mar, 2020 1 Answer 53 views

Initial angular velocity of a circular disc of mass M is . 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?

Anonymous User Physics Circular and Rotational Motion 25 Mar, 2020 1 Answer 53 views















The upper half of an inclined plane with inclination perfectly smooth while the lower half is rough. A body starting from rest at the top will again come to rest at the bottom if the coefficient of friction for the lower half is given by

Anonymous User Physics Laws of Motion and Friction 25 Mar, 2020 1 Answer 61 views

A smooth block is released at rest on a 45° incline and then slides a distance d. The time taken to slide is n times as much to slide on a rough incline than on a smooth incline. What is the coefficient of friction? 

Anonymous User Physics Laws of Motion and Friction 25 Mar, 2020 1 Answer 61 views

An annular ring with inner and outer radii R1 and R2 are rolling without slipping with a uniform angular speed. The ratio of the forces experienced by the two particles situated on the inner and outer parts of the ring, F1 /F2 is

Anonymous User Physics Laws of Motion and Friction 25 Mar, 2020 1 Answer 61 views

A block rests on a rough inclined plane making an angle of 30° with the horizontal. The coefficient of static friction between the block and the plane is 0.8. If the frictional force on the block is 10 N, then what is the mass of the block (in kg)? [take g = 10 m/s2]

Anonymous User Physics Laws of Motion and Friction 25 Mar, 2020 1 Answer 55 views








A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49 N, when the lift is stationary. If the lift moves down with an acceleration of 5 m/s2, what will be the reading of the spring balance?

Anonymous User Physics Laws of Motion and Friction 25 Mar, 2020 1 Answer 68 views

Three forces start acting simultaneously on a particle moving with velocity . These forces are represented in magnitude and direction by the three sides of a triangle ABC (as shown). The particle will now move with velocity

Anonymous User Physics Laws of Motion and Friction 25 Mar, 2020 1 Answer 71 views

Three identical blocks of masses m 2 kg are drawn by a force F = 10.2 N with an acceleration of 0.6 ms –2 on a frictionless surface, then what is the tension (in N) in the string between the blocks B and C?

Anonymous User Physics Laws of Motion and Friction 25 Mar, 2020 1 Answer 131 views


One end of a massless rope passes over a massless and frictionless pulley P, which is tied to a hook C while the other end is free. Maximum tension that the rope can bear is 960 N. With what value of maximum safe acceleration  can a man of 60 kg climb on the rope?

Anonymous User Physics Laws of Motion and Friction 25 Mar, 2020 1 Answer 53 views