Home
Class 11
PHYSICS
A large flat board is lying on a smooth ...

A large flat board is lying on a smooth ground. A disc of mass m = 2 kg is kept on the board. The coefficient of friction between the disc and the board is m = 0.2 . The disc and the board are moved with velocity `vec(u)=2hatims^(-1)` and `vec(V)=2hatJ ms^(-1)` respectively [in reference frame of the ground]. Calculate the power of the external force applied on the disc and the force applied on the board. At what rate heat is being dissipated due to friction between the board and the disc? [`g = 10 ms^(2)`]

Promotional Banner

Similar Questions

Explore conceptually related problems

A rough vertical board has an acceleration a so that a 2 kg block pressing against it dows not fall. The coefficient of friction between the block and the board should be

A body is kept on a horizontal disc of radius 2 m at a distance of 1 m from the centre . The coefficient of friction between the body and the surface of disc is 0.4. The speed of rotation of the disc at which the body starts slipping is (g=10 m//s^2 )

A force F is applied at the centre of a disc of mass M. The minimum value of coefficient of friction of the surface for rolling is

A uniform cylinder of mass M and radius R is placed on a rough horizontal board, which in turn is placed on a smooth surface. The coefficient of friction between the board and the cylinder is mu . If the board starts accelerating with constant acceleration a, as shown in the figure, then

A coin of 4 g mass is placed at a distance of 2 cm from the axis of rotation a disc,. If the frequancy of disc is 180 rpm, then the coefficient of friction between the coin at rest and disc will be

A board of mass m = 1 kg lies on a table and a weight of M = 2 kg on the board. What minimum force F must be applied on the board in order to pull it out from under the road ? The coefficient of friction between board and table is mu_(2) = 0.5 : (Take g = 10 m//s^(2) )

A disc is placed on the ground. Friction coefficient is mu . What is the minimum force required to move the disc if it is applied at the topmost point?

A disc of mass 5 kg and radius 50 cm rolls on the ground at the rate of 10 ms^(-1) . Calculate the K.E. of the disc.