Abstract
This frictional force is horizontal power to receive from sand. It is not drag received from the sand done by moon soft landing design of experiment [1]. In the beginning the power that lunar lander receives from sand in the surface of the moon and the amount of the cave-in to sand are confirmed with an experimental apparatus, and the influence received from sand is understood in the beginning. The analysis of the behavior when the lunar lander lands on the moon uses the mechanical analysis software named ADAMS. The coefficient of friction used at that time refers to the numerical value obtained from the experiment.
