Not the absence of gravity, but the absence of a support force. The ground pushes the cart equally forward because the horse pushes on the ground. This is proven by Newton s 3 rd Law of Motion. The acceleration produced by a net force on an object is directly proportional to the magnitude of the net force, is in the same direction as the net force, and is inversely proportional to the mass of the object. A skydiver jumps out of an airplane.
Center of gravity is the point located at the objects average position of weight.
All parts have the same rotational speed but the linear or tangential speed varies. An ice skater in order to spin faster brings in her arms and tucks her chin to her chest. Conservation of angular momentum Draw a diagram of the three different axes of the human body. Earth is blocking the sun from the moon. It s perpetual free-fall due to large enough tangential velocity.