Physics Past Questions and Answers

In which simple machine is the effort applied between the load and the fulcrum?

A body of weight 20N displaces 12N of the liquid in which it is immersed. What is the upthrust of the liquid on the body?

If the temperature of a resistance wire is gradually increased, its resistance will ____________

If the size of the hole of a pinhole camera is increased, the image formed becomes ____________

A man stands in front f a high wall and produces a sound. If he receives the echo of the sound four seconds later, what is his distance from the wall? [The speed of sound in air is 330ms^-1]