Vaishali Gupta, Shalini Bajaj and, Supriya D.Seshadri Solutions for Exercise 3: Exercises

Define the following.

Motion

Discuss with examples of how people measured length in ancient times. 

Discuss the precautions that one should take while measuring length with a ruler.

Explain how one can measure the length of a curved line using a string. 

Describe the different types of motion with examples.

Usha wants to buy a dupatta that is $250 \mathrm{cm}$ long. The shopkeeper wants her to give the measurement in metres. Can you help her? 

Maya's Physics textbook is $11 \mathrm{mm}$ thick and her Maths textbook is $1 \mathrm{cm}$ thick. Which textbook is thicker? 

Amar lives in a hostel which is  $20,00,000 \mathrm{m}$ away from his house. Calculate the distance in $\mathrm{km}$.