A satellite is orbiting Earth 1.00 x 10^2 km above the surface. At this altitude, g = 9.5 m/s^2. If earth's radius is 6.4 x 10^3 km, what is the period of revolution of the satellite?
ANSWER: 5.2 x 10^3s (1.4hr)
A 0.145-kg baseball traveling 25 m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 20 cm. What was the magnitude of the average force applied by the ball on the glove?
Answer = 227