At t = 0 a ball is thrown upward from the
ground at point O. Two seconds later the ball
hits the ground. What is the maximum height of the ball?
Take the acceleration due to gravity to be 10
m/s^2
What is the initial velocity of the ball?
For an initial velocity of v0, what is the velocity of the ball as it passes the point A on its
way up, where OA is one third the maximum
height?

Determine the time it takes for a satellite to orbit the earth in a circular "near-earth" orbit. the definition of "near-earth" orbit is one which is at a height above the surface of the earth which is small compared to the radius of the earth, so that you may take the acceleration due to gravity as essentially the same as that on the surface. does your result depend on the mass of the satellite?