Physics

At what height from the surface of earth the gravitation potential and the value of g are −5.4 × 10^7 J kg^−2 and 6.0 ms^−2 respectively? Take the radius of earth as 6400 km. At what height from the surface of earth the gravitation potential and the value of g are −5.4 × 10^7 J [...]

The acceleration due to gravity at a height 1 km above the earth is the same as at a depth d below the surface of earth. Then. The acceleration due to gravity at a height 1 km above the earth is the same as at a depth d below the surface of earth. Then. August [...]

A solid cylinder of mass 2 kg and radius 4 cm rotating about its axis at the rate of 3 rpm. The torque required to stop after 2π revolution is A solid cylinder of mass 2 kg and radius 4 cm rotating about its axis at the rate of 3 rpm. The torque required to [...]

The moment of the force, vector F = 4i cap + 5j cap – 6k cap at (2, 0, – 3), about the point (2, –2, –2), is given by:- 2 3% about the point (2 is given by The moment of the force vector F = 4i cap + 5j cap - 6k cap [...]

A tube of length L is filled completely with an incompressible liquid of mass M and closed at both the ends. The tube is then rotated in horizontal plane about one of its ends with a uniform angular velocity ω. The force exerted by the liquid at the other end is A:(a solid sphere) B: [...]

Three objects, A:(a solid sphere), B: (a thin circular disk) and C:(a circular ring), each have the same mass M and radius R. They all spin with the same angular speed ω about their own symmetry axes. The amounts of work (W) required to bring them to rest, would satisfy the relation. A:(a solid sphere) [...]

A uniform rod of length l and mass m is free to rotate in a vertical plane about A. The rod initially in horizontal position is released. The initial angular acceleration of the rod is (Moment of inertia of rod about A is 3/ml^2.) The instantaneous angular position of a point on a rotating wheel [...]

A wheel has angular acceleration of 3.0 rad/s2 and an initial angular speed of 2.00 rad/s. In a time of 2 s it has rotated through an angle (in radian) of A wheel has angular acceleration of 3.0 rad/s2 and an initial angular speed of 2.00 rad/s. In a time of 2 s it has [...]

A thin circular ring of mass M and radius R is rotating in a horizontal plane about an axis vertical to its plane with a constant angular velocity ω, If two objects each mass m be attached gently to the opposite ends of a diameter of the ring, the ring, will then rotate with an [...]

If F be the force acting on a particle having position vector r and τ be the torque of this force about the origin. Then, If F be the force acting on a particle having position vector r and τ be the torque of this force about the origin. Then August 29, 2020 Category: Chapter [...]