Newton’s First Law: If the resultant force acting on an object is zero and: • the object is stationary, the object remains stationary • the object is moving, the object continues to move at the same speed and in the same direction. So the object continues to move at the same velocity. • So, when a vehicle travels at a steady speed the resistive forces balance the driving force. • So, the velocity (speed and/or direction) of an object will only change if a resultant force is acting on the object. • Students should be able to apply Newton’s First Law to explain the motion of objects moving with a uniform velocity and objects where the speed and/or direction changes.