Subject Experts Solutions for Chapter: Friction, Exercise 4: NUT HUNT

The terms that you came across in the chapter (Friction) are hidden in the alphabet grid given below. Try to find out all of these terms by going up, down, or even diagonally forward as well as backward.

Follow the clues and solve the terms you have learned.
Across :

1. The friction acting when one body rolls over the surface of another body $(7, 8)$.
4. The frictional force exerted by fluids $(5, 8)$.
6. The overlapping or fitting together of tiny hills and grooves in the form of irregularities on two surfaces in contact.

Down:

2. A bearing that permits rolling between moving and fixed parts by means of small metal balls confined between outer and inner rings, which reduces friction $(4,7)$.
3. Substances that reduce friction.
5. The friction acting when one body slides over the surface of another body $(7,8)$ .
7. The force required to overcome friction at the instant an object starts moving from rest $(6,8)$ .