A machine has a velocity ratio of 5. It requires a 50kg weight to overcome a 200kg weight. The efficiency is

Similar Questions

A bird flies at 10ms$^{-1}$ for 3s, 15ms$^{-1}$ for 3s and 20 ms$^{-1}$ for 4s. Calculate the ...

A metal of volume 40 cm3 is heated from 30 °c to 90 °c, the increase in volume is ...

Four co-planar forces of magnitudes 10N, 17N, 6N and 20N act at point O as shown in the above diagra...

Which of the following is not a suitable method for reducing loss of heat from a piece of hot iron? ...

A quantity which requires magnitude and direction to be specified is ...

A spring balance,which is suspended from the roof of a lift, carries a mass of 1kg at its free end. ...

In measuring high frequency a.c, the instrument used is the ...

A ray of light passes through the centre of curvature of a concave mirror and strikes the mirror. At...

The range of wavelengths of the visible spectrum is 400nm - 700nm. The wavelength of gamma rays is ...

The diagram above illustrates a beam of parallel rays from a distant object O, incident on one side ...