July 23, 2007 at 6:45 am #22828 eastfieldgiirl04Guest @ the net force on the rock is? a. less than its weight b. more than its weight c. its weight d. zero July 23, 2007 at 3:55 pm #42770 JOHN F NGuest @ It is zero until the force of gravity pulls it down and depending on the weight of the rock will determine the g’s . It is zero, because at the very top of its trajectory the rock is not moving until gravity pulls it downward. Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to create new topics.