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A small block with a mass of 0.117 kg is attached to a cord passing through a hole in a horizontal frictionless surface as shown in the figure below. The block is originally revolving at a distance of 0.33 m from the hole with a speed of 0.66 m/s. The cord is then pulled from below, shortening the radius of the circle in which the block revolves to 0.10 m. At this new distance the speed of the block is observed to be 2.80 m/s.
(a) What is the tension in the cord in the original situation when the block has speed v = 0.66 m/s?
(b) What is the tension in the cord in the final situation when the block has speed v = 2.80 m/s?
(c) How much work was done by the person who pulled on the cord?
Make a drawing of this situation, and choose the best axes for x and y so that you have the least number of components.)
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An ideal spring with a stiffness of 379N/m is attached to a wall, and its other end is attached to a block that has a mass of 16-kg. The spring/block system is then stretched away from the spring's relaxed position until 59J of mechanical potentia..
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Consider a standing wave on the string with a frequency equal to the fifth harmonic (fn = nf1 with n = 5). How many nodes and antinodes does this standing wave possess.
Consider an XY coordinate plane. Wire A is placed along the y-axis at x=0 and wire B is placed parallel to wire A at x= 0.240 m, Find the magnitude of the magnetic field at x=0.380 m
What are angles of refraction
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