The speed of the vehicle is 62.8 m/s
We have the descent vehicle landing on the moon and the following information are available;
vertical velocity toward the surface of the moon = 29.1 m/s
horizontal velocity = 55.6 m/s
Thus the speed along the descent path = √(29.1)^2 + ( 55.6)^2
= 62.8 m/s
Now the angle is obtained from;
180° - tan-1( 55.6/29.1)
= 118 degrees
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