Average Acceleration?

If the satellite is directly above the equator and traveling east at time t, find the average acceleration dur?

• An artificial earth satellite has a circular orbit of radius 7.21 106 m (which means it is orbiting approximately 850 km above the surface of the earth) in an equatorial plane. The period T (the time required for one complete orbit) is 5.63 103 s (about 1.56 h). (a) Compute the (constant) speed of the satellite. (b) If the satellite is directly above the equator and traveling east at time t, find the average acceleration during the time interval from t to t + T/40.0. (c) Find the satellite's instantaneous acceleration at time t. I got answer A & C a: 8046.49 m/s c: 8.98 m/s^2 However, I don't understand how to do B. Please help

• Answer:

  Since the acceleration is constant, the value in (c) should be the answer. (8.98 m/s² toward the center of the earth)