Question

A particle has kinetic energy 20times it's rest energy in speed c is

Answer 1

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The speed of a particle whose kinetic energy is equal to its rest energy is ,we know that kinetic energy is 1/2 mv^2 and the energy at rest is m*g*h.

If mgh = 1/2mv^2

2mgh/m = v^2

2gh = v^2

V=√2gh

So therefore speed of a particle when kinetic energy is equal to rest energy is

V= √2gh