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NEWTONS 2ND LAW 1 When a coin is flipped in an airplane moving at constant velocity , where will the coin land ? 2 If the coin is flipped as the plane accelerates during take off , where will it land ? If the coin is flipped as the plane decelerates while landing , where will it land ? 4 If the force = 3N , then how much friction force is there ? If 18 tons of thrust are required to lift an airplane , how much friction force is there ? If more thrust were used , what would happen to the plane speed ? As the net force increases , how does acceleration change ? 8 Is acceleration proportional to mass ? 9 In the parachute example , are both parachutes accelerating ? 10 What is the air resistance on a falling leaf when it reaches its terminal velocity