2006-10-10 08:29:16 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics
If only one force acts on an object, the total force will necessary be other than 0 N, hence the acceleration cannot be zero since F=m*a => a=F/m.
A ball that is thrown up into the air will reach a maximum height, at the exact time it does this, it Will have a single force acting on it (gravity - the buoyancy of air is neglected), hence the acceleration will be other than zero, but the velocity will be zero at that exact moment.
2006-10-10 09:55:07 · answer #1 · answered by Jens F 2 · 0⤊ 0⤋
I guess not. An object sitting on a table has two forces on it. Gravity pulling it down and the table pushing it up. Strange as it seems, the table is exerting a force. The equal and opposite force that Newton's 3rd law describes.
2006-10-10 15:39:03 · answer #2 · answered by campbelp2002 7 · 0⤊ 0⤋