Based on your knowledge of the gravitational force near the surface of the earth and on Newton's second law, explain the sign and magnitude of the acceleration of the coin in the last question during the three portions of its motion.
on its way up ;
at the highest point ;
on the way down ;
a. 9.8 m/s2
b. 0 m/s2
c. -9.8 m/s2
d. None of the other choices are correct for this situation.