8. You are just hired as computational physicist at the newly established Exoplanet Dvision of NASA. A colleague of you

[answerhappygod]

8.
You are just hired as computational physicist at the newly
established Exoplanet Dvision of NASA. A colleague of yours
is attempting to determine the ratio of the orbital radii of two
exoplanets orbiting a massive star in our galaxy. She just figured
out the ratio of the orbital speeds of the two exoplanets to be
2. In other words Exoplanet A orbits twice as fast as
Exoplanet B. She knows that you are an expert in this matter
and asked you to help her determine the ratio of the oribital
radius rB/rA . To her surpise you did
the the calculation and gave her the the right answer in no
time. Your answer was
You and your friend are playing soccer. Before you hit the ball
you made sure that you, your firiend and soccer ball are at the
same initial position. You know that your friend is a good
runner.In fact he is the champion of the 100 meter dash in your
school. You called ready-set-go and hit the ball at 18 m/s at an
angle 60 deg. How dast must your friend run to receive the ball
just before it hits the ground. ? (Ignore air resistance).
cosine of 60= 0.5
sine of 60 = 0.87
tangent of 60 =0.57
g = 9.8.m/s2