As seen from Earth, a star has a transverse velocity of 96 km/s and a radial velocity of 64 km/s. Calculate its space velocity with respect to Earth, in km/s. V= - km/s

The answer is wrong

= (a) A shell is shot with an initial velocity vo of 20 m/s, at an angle of 00 60° with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment, whose speed immediately after the explosion is zero, falls vertically. How far from the gun does the other fragment land, assuming that the terrain is level and that air drag is negligible?

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