E Doris James, Vandana Tirath, Anton Siromani and, Kiran Banerji Solutions for Chapter: Time and Motion, Exercise 2: Exercises

The most accurate of all clocks is the _____.

Which of these is not a unit of time?

Which of these is the SI unit of time?

The time period of oscillation of a simple pendulum which takes $38 \mathrm{s}$ for $20$ oscillations is ____

Which of these cannot be a unit of speed?

$20 \mathrm{m} {\mathrm{s}}^{-1}$ is equal to ____.

The average speed of a car that covers a distance of $150 \mathrm{km}$ in $3 \mathrm{h}$ is 

A car travelling from Chennai at an average speed of $60 \mathrm{km} {\mathrm{h}}^{-1}$ reaches Bangalore in $5.5$ hours. The distance between the two cities is ____.