You swing a 1.65-kg rock tied to a rope in a vertical circle of radius 0.75 m. When the rock reaches the top its speed in 3.25 m/s.
A.) Calculate the acceleration of the rock at the top and show it's direction.
B.) Calculate the tension in the rope at the top of the circle.
C.) What minimum speed should the rock have at the top for the rope to remain barely taut?
D.) With minimum speed at the top in part (d), what will be the speed of the rock when it comes to the bottom? Neglect air resistance and use of conservation of energy.