Tuesday
July 22, 2014

Homework Help: Physics

Posted by Christina on Wednesday, November 7, 2007 at 4:54pm.

A small block on a frictionless horizontal surface has a mass of 2.5010−2 Kg. It is attached to a massless cord passing through a hole in the surface. The block is originally revolving at a distance of 0.300 m from the hole with an angular speed of 1.75 rad/s. The cord is then pulled from below, shortening the radius of the circle in which the block revolves to 0.150 m. You may treat 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?

(I'm having problems setting up/figuring out which equations to use)

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

physics - A small block on a frictionless horizontal surface has a mass of 2.50...
Physics - A small block on a frictionless horizontal surface has a mass of 2.50...
Physics - A small block with a mass of m = 0.120 kg is attached to a cord ...
physics - A mass of 0.04 kg is attached to a cord passing through a small hole ...
Physics - A small block on a frictionless surface has a mass of 70 g. It is ...
physics - A block of mass 4.44 kg lies on a frictionless horizontal surface. The...
Physics - A block of mass 5.53 kg lies on a frictionless horizontal surface. The...
physics - A block of mass 3.62 kg lies on a frictionless horizontal surface. The...
physics - A mass m is attached to a cord passing through a small hole in a ...
Physics - A 4 kg block resting on a horizontal surface is attached to an 8 kg ...

Search
Members