A wire of mass 0.5 gram and length of 0.5 m is under a tension of 2 kg wt. Calculate the frequency of its fundamental mode. `(g = 9.8 m/s^2)`

A steel piano wire 0.5 m long has a total mass of 0.01 kg and is stretched with a tension of 800 N. The frequency, when it vibrates in its fundamental mode, is

A steel rod of 1 m is supported at its ends so that it remains horizontal. Three spheres of masses 4 kg, 6 kg, 8 kg, are suspended from 15 cm, 40 cm and 80 cm marks respectively . If weight of rod is 2 kg wt, calculate the reaction at each support. ( g= 9.8 m//s^2)

The coefficient of static friction between a block of mass 0.25 kg is 0.4. Calculate the force applied to it. (g = 9.8m//s^2)

A flywheel of mass 4 kg has radius of gyration 0.4 m. Calculate the kinetic energy of rotation when it makes 5 r.p.s

A sonometer wire 36 cm long vibrates with a fundamental frequency of 280Hz , when it is under tension of 24.5 N . Calculate mass per unit length of wire.

A wire of 1 m long and weighing 2 g will be in resonance with a frequency of 300Hz . Find tension on stretching of wire.

At what tension a wire of length 1 m and mass 2 gram will be in resonance with frequency of 350 Hz .

Length of 0.3 m wire vibrates in fundamental mode at frequency 480 Hz. The velocity of sound wave in air is

The speed of a transverse wave along a uniform metal wire, when it is under a tension of 1000 g wt is 68m/s .If the density of metal is 7900 kg/m^3 , find the area of cross section of the wire.

Calculate the work done to take an object of mass 20 kg to a height of 10 m. (g = 9.8 m/s2)