Because of Inertia, And Inertia is a force which keeps stationary objects at rest and moving objects in motion at constant velocity. Inertia is a force which brings all objects to a rest position.
When the table tilted at 45 degrees, the objects move faster rather than it was tilted at 15 degrees.
When a force pushes or pulls the object, the object will move in the direction of the force. Force can make things move, change shape or change their speed.
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