Asmall block with a mass of 0.0600 kg is attached to a cord passing through a hole in a frictionless, horizontal surface (figure 1) . the block is originally revolving at a distance of 0.47 m from the hole with a speed of 0.63 m/s . the cord is then pulled from below, shortening the radius of the circle in which the block revolves to 9.0×10? 2 m . at this new distance, the speed of the block is 3.29 m/s .

a small block with a mass of 0.0600 kg& n

part a.) what is the tension in the cord in the original situation when the block has speed v0 = 0.63 m/s ? (t=? )

part b.) what is the tension in the cord in the final situation when the block has speed v1 = 3.29 m/s ? (t=? )

part c.) how much work was done by the person who pulled on the cord? (w=? )

i really need to understand this : o