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Script 1 (07-08-2020)
3
Transcript
WELCOME TO
INTERACTIVE VIDEO SERIES
NCERT
Topic:
You spill a bucket of soapy water on a marble floor accidentally. Would it make it easier or more difficult for you to walk on the floor? Why?
Subject: Physics
Class: 8th
Have you ever slipped into your bathrooms after your mother finishes washing the clothes? Have you ever thought of the reason why this happens?
Heard of friction before?
Friction is the force which resists the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. Friction is the force which helps you to walk, run and do various things. Lesser the friction more will be the difficulty in walking.
Have you ever noticed that if the water is spilt on a rough, you won't slip but if the water is spilt on smooth tiles there is a higher possibility that you may slip?
This happens because smooth tiles have less friction and spilt water further reduces the friction of the tiles.
Water spilt on a marble floor but this time it is soapy water, so according to you what is the probability that a person may fall? What do you think the probability will be more for a person to fall on the floor spilt with water or on the floor spilt with soapy water?
The possibility of a person falling on a floor with soapy water spilt on it will be more from the floor with only water spilt on it because soap will make the floor more frictionless as compared to water.
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