In which of the following situations is friction not useful?

Similar Questions

A solid weigh 10 .00 N in air, 6 N when fully immersed in water and 7 . 0 N when fully immersed in a...

A magnetic needle is suspended first at the earth's north magnetic pole and then at a point on t...

A point charge of 1.0 x 10-7 C experiences force of 0.01 N in a uniform electric field. Calculate th...

If a reverse-biased voltage is applied across a p-n junction, the depletion layer width is ...

in the image above, an incident ray XY makes an angle of 15$^{\circ}$ with a fixed line AY which...

A man of mass 50kg ascends a flight of stairs 5m high in 5 seconds. If acceleration due to gravity i...

A machine gun with a mass of 5kg fires a 50g bullet at a speed of 100 ms$^{-1}$. The recoil speed ...

The force experienced by an object of mass 60.0kg in the moon's gravitational field is 1.002 x 102N....

Which of the following are contact forces? I. Force of tension II. Force of fiction, III. Magne...

A real image of an object formed by a converging lens of focal length 15cm is three times the size o...