1005 - Physics Questions Answers

If two discs of moment of inertia a and b rotating about collinear axis passing through their centres of mass and perpendicular to their plane with angular speeds c and d respectively in opposite directions  are made to rotate combinedly along same axis, then the magnitude  of angular velocity of the system is?

If two discs of moment of inertia a and b rotating about collinear axis passing through their centres of mass and perpendicular to their plane with angular speeds c and d respectively in opposite directions  are made to rotate combinedly along same axis, then the magnitude  of angular velocity of the system is?

A uniform rod AB, 4m long and weighing 12 kg, is supported at end A, with a 6kg lead weight at B. The rod floats as shown in the figure with one-half of its length submerged. The buoyant force on the lead mass is negligible as it is of negligible volume. Find the tension in the cord and total volume of the rod.

A uniform rod AB, 4m long and weighing 12 kg, is supported at end A, with a 6kg lead weight at B. The rod floats as shown in the figure with one-half of its length submerged. The buoyant force on the lead mass is negligible as it is of negligible volume. Find the tension in the cord and total volume of the rod.

a body of mass 3m travelling  due east with a speed 2u collides with a body of mass 2m with a speed of u .show that  the speed after collision of body mass 2m  = 1/5(9e + 4)u when the coefficient of restitution is e

What is the main priniciple  strore energy in a capacitor ?

 

Two particles a&b are initally at rest at a distance of l. Now it A start moving with constant velocity u along perpendicular to straight line joining initial position of a&b while b start moving with constant speed v such that its velocity is always directed toward instantaneous positions of a. Find the time after which b catches a

A lift ascends from rest with uniform acceleration of 4m/s^2, then it moves with uniform velocity and finally comes to rest with uniform retardation of 4m/s^2. If the total distance covered during ascending is 28m and total time taken for ascending is 8s respectively. Find the time for which the lift moves with uniform velocity .Also find its uniform Velocity.
 

 

 

 

 

A lift ascends from rest with uniform acceleration of 4m/s^2, then it moves with uniform velocity and finally comes to rest with uniform retardation of 4m/s^2. If the total distance covered during ascending is 28m and total time taken for ascending is 8s respectively. Find the time for which the lift moves with uniform velocity .Also find its uniform Velocity.