The radius of the moon is one fourth and its mass is one eighty first that of the earth. If the acceleration due to gravity on the earth's surface is 9.8meter per square. What is its value on the moon's surface?

The moon is the earth's nearest neighbor in space the radius of the moon is approximately one quarter of the earth's radius and it's mass is one eightieth of the earth's mass. (a) calculate the weight of an object with a mass of 50.0kg on the surface of the moon. (b) calculate the weight of an object with a mass of 80.0kg when it is at a distance equal to three times the moon's radius away from the moon