Is friction due to charge ?

Recently , I came across a question. It is a multiple correct answer type : Q . If all the objects in the universe are neutral like neutron (a)Force of friction does not exist (b)Tension in a string is not possible (c)We cannot sit on a chair (d)Planets cannot revolve around the Sun . Answer is (a),(b),(c) . Please help !

#JEE #Keshav

Easy Math Editor

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Comments

All contact forces are electromagnetic including normal and friction. So the given answer is correct

Rohit Shah - 6 years, 1 month ago

The reality is that the charge of the universe is quantized and net charge is 0

shubham gupta - 6 years, 1 month ago

A --friction definition it is interlocking due to atomic interaction of charges

shubham gupta - 6 years, 1 month ago

Math	Appears as
Remember to wrap math in `\(` ... `\)` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$