# Question: a neutron travels to the right at a velocity of...

###### Question details

A neutron travels to the right at a velocity of 0.63 c relative
to an observer at rest on the surface of the Earth (sometime called
the “Laboratory Frame”). An alpha particle travels to the right at
a velocity of 0.75 c relative to the moving neutron. What is the
velocity of the alpha particle relative to the observer at rest on
the surface of the Earth (give your answer in terms of “c”)?
**Make sure that you draw a diagram and that you label S, S’,
u _{x}, u_{x'}, and v.** Also, remember that
velocity is a vector.