Question

The kinetic energy of a particle of mass m moving with speed v is given by `K=(1)/(2)mv^(2)`. If the kinetic energy of a particle moving along x-axis varies with x as `K(x)=9-x^(2)`, then The region in which particle lies is :
A. `xge9`
B. `-3lexxle3`
C. `0lexxle9`
D. `-ooltxxltoo`

Answer 1

Correct Answer - B
As `K=(1)/(2)mv^(2)ge0` so `9-x^(2)ge0rArr-3lexxle3`