Projectile motion with zero launch angle

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Projectile motion with zero launch angle
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Projectile Motion motion in x direction is
independent of motion in y direction.
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Projectile motion with reference to the curvature
of the Earth
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Isaac Newton
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A satellite is no more than a projectile moving
fast enough to continually clear the horizon as
it falls.
v 8 km/s
v 11 km/s
Why are rockets fired in the easterly direction?
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An astronaut floats weightlessly while orbiting
100 miles above the Earths surface. The
astronaut experiences weightlessness because

• There is no gravity in space
• The Earths gravity decreases very rapidly with
  distance and is almost zero at 100 miles above
  the Earths surface.
• The astronaut is falling towards Earth and also
  moving tangent to the Earth resulting in an
  orbital path.
• Astronauts floating weightlessly are not real. It
  is a conspiracy between the government and the
  movie companies.

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General Launch Angle
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How far does the cannonball fall at t 1, 2 and
3 seconds?
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If the cannonball was fired faster how far would
it fall at t 1, 2 and 3 seconds?
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If the cannonball was fired at a different angle
how far would it fall at t 1, 2 and 3 seconds?
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