Question: A small block on a frictionless, horizontal surface has a mass of 2.3010 2 kgkg. It is attached to a massless cord passing through a

A small block on a frictionless, horizontal surface has a mass of 2.3010² kgkg. It is attached to a massless cord passing through a hole in the surface (Figure 1). The block is originally revolving at a distance of 0.300 mm from the hole with an angular speed of 2.71 rad/srad/s. The cord is then pulled from below, shortening the radius of the circle in which the block revolves to 0.150 mm. Model the block as a particle.What is the new angular speed?Find the change in kinetic energy of the block.How much work was done in pulling the cord?

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