Last updated on October 22nd, 2023 at 09:55 pm
Q: (c) Powder is sprinkled on a carrom board.
A: A carrom board is sprinkled with powder to reduce friction. When powder is sprinkled on the board, it forms a bond between the pieces and the board, reducing friction, making play more enjoyable and pieces moving more easily.
(d) The ramp at a railway station has a rough surface.
At a railway station, the ramp surface is rough, which increases friction. The rough surface provides better grip for pedestrians. It prevents slipping and provides a safe passage.
Write answers to the following questions in your own words.
(a) What are the things that can be done by applying force ?
Things that can be done by applying force include lifting, pushing, pulling, stopping, or moving. You can apply force to lift a heavy bag, push a car, pull a door, stop a bicycle, and move a book across a table.
(b) What is meant by weight ?
A weight is a measurement of gravitational pull exerted on a mass object. It is usually expressed in pounds or kilograms. Object weight varies based on its location, because gravity is directly proportional to the weight.
(c) Which machines run on muscular force ?
Muscle-powered machines require human effort to operate. Among them are hand pumps, hand-operated tools, sewing machines, and other hand-operated tools and equipment that are powered by muscular strength.