Tarzan, mass 85 kg, swings down on the end of a 20-m vine from a tree limb 4.0 m above the ground. Sketch the situation.
a. How fast is Tarzan moving when he reaches the ground?

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.