Forces in action________________________________________________________________11. Misconceptions
• If an object is moving, there must be some force making it move. Wrong! It could be moving without accelerating. • If v = 0, then Fnet must be zero. Wrong! Think of a projectile shot straight up at its peak.• An object must move in the direction of the net force. Wrong! It must accelerate that way but not necessarily move that way. • Heavy objects must fall faster than light ones. Wrong! The rate is the same in a vacuum.• If an object accelerates, its speed must change. Wrong! It could be turning at constant speed.