1)What is the new angular speed? 2)Find the change in kinetic energy of the bloc

Question

1)What is the new angular speed? 2)Find the change in kinetic energy of the block. 3)How much work was done in pulling the cord?
A small block on a frictionless, horizontal surface has a mass of 2.50

1)What is the new angular speed? 2)Find the change in kinetic energy of the block. 3)How much work was done in pulling the cord? A small block on a frictionless, horizontal surface has a mass of 2.50 A10?2kg . It is attached to a massless cord passing through a hole in the surface (the figure ). The block is originally revolving at a distance of 0.300 m from the hole with an angular speed of 1.65rad/s . The cord is then pulled from below, shortening the radius of the circle in which the block revolves to 0.150 m. Model the block as a particle.

Explanation / Answer

Here is what I solved before, please modify the figures as per your question. Please let me know if you have further questions. Ifthis helps then kindly rate 5-stars.

A small block on a frictionless, horizontal surface has a mass of 2.50

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