10 kg ভর এবং 0.2 m ব্যাসার্ধের একটি চাকা 100 rpm এর কৌণিক গতিতে ঘুরছে, যখন মতি...

A wheel of mass 10 kg and radius 0.2 m is rotating at an angular speed of 100 rpm, when the motion is turned off. Neglecting the friction at the axis. Calculate the force that must be applied tangentially to the wheel to bring it to rest in 10 rev. Assumed wheel to be a disc.

A flywheel of mass 25 kg has a radius of 0.2 m. It is making 240 r.p.m. what is the torque necessary to bring it to rest in 20 s ? If the torque is due to a force applied tangentially on the rim of the flywheel, what is the magnitude of the force ?

Two heavy spheres each of mass 100 kg and radius 0.1 m are placed 1.0 m apart on a horizontal table. What is the gravitational field and potential at the mid point of the line joiningthe centres of the spheres ? Take G= 6.67xx10^(-11)Nm^(2)Kg^(-2) .

A grindstone of moment of inertia 6 kg m^(2) is found to have a speed of 150 rpm, 10 sec . After starting from rest. Torque applied is

A body of mass 5 kg is moving with a momentum of 10 kg m//s . A force of 0.2 N acts on it in the direction of motion of the body for 10 sec. The increase in its kinetic energy.

Two solid spheres of radius 10 cm and masses 800 kg and 600 kg, are at a distance 0.25 m apart. Calculate distance 0.20 m from the 800 kg sphere and 0.1 m from the 600 kg sphere and does not lie on the line joining their centres. Given, G = 6.6 xx 10^(-11) N-m^(2) kg^(-2) .

What is the velocity of an electron (m = 9.11 xx 10^(-28) g) that exhibits a de Broglie wavelength of 10.0 nm ? [ 1 J = 1kg dot" m^(2)* s^(2) ]