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mitchmaniac20
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Homework Statement
A rocket passes the Earth at 0.8c. As it goes by, it launches a projectile at 0.6c perpendicular to the direction of motion. What is the projectile's speed in the Earth's reference frame?
Homework Equations
[;u=\frac{u'+v}{1+u'v/{c}^{2}};]
The Attempt at a Solution
Since in the direction of the rocket's motion, u'=0, u=v=.8c. In the perpendicular direction since v=0, u'=u=.6c. However, this makes the overall speed of the projectile [;\sqrt{{.8c}^{2}+{.6c}^{2}}=c;], which shouldn't be possible...
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