1.

A particle moves in a straight line with retardation propotional to itsdisplacement. Loss of K.E. for any displacement x is proportional to :

Answer»

`x^2`
`e^x`
x
`log_e` x

Solution :Here, it is GIVEN that MAGNITUDE of `a prop x(But a=V/t)v/t prop x`
If time INTERVAL is kept the same `v prop x` and `v^2 prop x^2`
`:.K.E. E_k prop v^2` or `E_k prop x^2`


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