In which of the following situations is friction not usef...
In which of the following situations is friction not useful?
Operation of a grinding machine
Walking
Application of brakes
Moving piston in a sleeve
Correct answer is D
friction, force that resists the sliding or rolling of one solid object over another.
Examples of friction in our daily life
Workdone on an object to bring it to a certain point in space is called ...
The invisible part of the spectrum of a white light consists of the following colors ...
Which of the following obeys ohms laws? ...
The mode of transference of heat which does not require any material medium is ...
In photo-emission, the number of photo-electrons ejected per second depends on the? ...
A boy in a barber's shop sits between two parallel mirrors. The number of images observed by him...
Which of the following statements about X-rays is not correct? They ...