Learning from the physic-al world

Surekha Nayani

physics Physics is everywhere around us – in the working of electric appliances, modes of travel, means of entertainment, medical aids, cooking devices. This is why the subject is better learnt by observing the things around us. Surely, it is very important for physics teachers to explain physics concepts using daily life experiences in order to excite students to explore the subject. Maybe try telling them a story that has physics concepts woven in?

A day in the life of Shailesh Nanisetty
Friction

Shailesh Nanisetty is studying in class X and is a busy bee shuttling between home, school, and sports clubs. Let’s take a look at a day in his life. It is a Sunday. Shailesh wakes up at 7 a.m. and is running late for his cricket academy. He gets ready and puts on his spiked shoes. The spikes on the soles of the shoes increase friction when they touch the ground stopping players from skidding on the smooth surfaces of playgrounds which have less friction. He then takes his cricket kit, which is fixed with four wheels so that it can be pulled along on the ground easily by reducing the friction of the ground. This is called rolling friction. He put the kit on the cycle stand and rode away. The tyres of the cycle have grooves that increase the friction when they come into contact with the road and reduce skidding.

As he was already late, Shailesh began riding fast. In order to increase his speed he bent the upper part of his body. This action led to the reduction of the friction of air on him increasing his riding speed.

The author is working as Head of the Department for Science and also as the CBSE Co-ordinator in Delhi Public School, Nacharam, Hyderabad. She can be reached at sulekhanayani@gmail.com.

This is an article for subscribers only. You may request the complete article by writing to us at editorial@teacherplus.org.