Why does a buoyant force act on every object in a fluid? A. The water pressure pushing upward is greater than the force of gravity pulling downward
B. Pressure pushing up on the bottom of the object is greater that the pressure pushing down on the top
C. Forces acting on the top of the object are greater than the other forces acting on the object

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f