Question

When an object traveling with initial velocity vi increases its velocity to 1.56vi, its momentum increase...

When an object traveling with initial velocity vi increases its velocity to 1.56vi, its momentum increase from pi to 5.63pi.

What was the initial velocity vi in units of c?

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Answer #1

Initial momentum is

consider this equation 1

When velocity is increased, the momentum becomes

consider this equation 2

equation 1 divided by equation 2 gives

squaring both sides, we get

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