The law of universal gravitation states that any two objects in the universe, without exception,
a.
attract each other.
b.
repel each other.
c.
combine to provide a balanced force.
d.
create friction.

An astronaut on the moon throws a baseball upward. the astronaut is 6 ft, 6 in. tall, and the initial velocity of the ball is 3030 ft per sec. the height s of the ball in feet is given by the equation s equals negative 2.7 t squared plus 30 t plus 6.5s=−2.7t2+30t+6.5, where t is the number of seconds after the ball was thrown. complete parts a and b.