Newton's first law of motion states that an object will maintain its current state of motion unless acted on by an unbalanced net force. which of the following statements is not a proper application of this law to an object's motion? dave cannot throw a bowling ball as high in the air as a golf ball. when alex slams on the brakes in his car, his body flies forward until stopped by the seatbelt. the air hockey puck struck by brian moves in a straight line until it hits a wall. a rock remains motionless on the ground until jacob kicks it.