Physics Past Questions and Answers

The pair of physical quantities that are scalar only are ?

A simple pendulum of length 0.4m has a period of 2s. What is the period a similar pendulum of length 0.8m at the same place?

A train with an initial velocity of 20ms<sup style='font-size: smaller;'>-1</sup> is subjected to a uniform deceleration of 2m<sup style='font-size: smaller;'>-2</sup>. The time required to bring the train to a complete halt is?

Calculate the apparent weight loss of a man weighing 70kg in an elevator moving downwards with an acceleration of 1.5ms<sup style='font-size: smaller;'>-2</sup>. <br/>[g = 10ms<sup style='font-size: smaller;'>-2</sup>]

A piece of cork floats in a liquid. What fraction of its volume will be immersed in the liquid? <br/>[Density of the cork = 0.25 x 10<sup style='font-size: smaller;'>3</sup>kgm<sup style='font-size: smaller;'>-3</sup>, Density of the liquid = 1.25 x 10<sup style='font-size: smaller;'>3</sup>kgm<sup style='font-size: smaller;'>-3</sup>]