Homework Help: Physics

Posted by Tammy on Wednesday, October 3, 2007 at 1:58pm.

A stone is thrown straight up. At the top of the path, the net force acting on it is (ignore air resistance)
a) greater than its weight
b) greater than zero, but less than its weight
c) instantaneously equal to zero
d) equal to its weight

At the very top of the path wouldn't a=0 at than instance so F=ma
thus results in a net force of 0 N ? so c) is the correct answer right?

Physics - Quidditch, Wednesday, October 3, 2007 at 2:56pm
Objects can have an acceleration, but not be moving. When you are standing still, you are still experiencing the acceleration of gravity.

C is not correct

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