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A playground merry-go-round of radius 2.00 m has a moment ofinertia I = 300kg·m2 and is rotating about a frictionlessvertical axle. As a child of mass 25.0 kg stands at a distance of1.00 m from the axle, the system (merry-go-round and child) rotatesat the rate of 15.0 rev/min. The childthen proceeds to walk toward the edge of the merry-go-round. What is the angular speed of the system when the child reaches the edge?rad/s
question1consider an element of air in the standard atmosphere at a standard altitude of 1000 m. imagine that you
determine the angle below the horizontal that you must aim your spear gun in order to catch dinner. Suppose the spear gun barrel is 1.70 m above the water surface, the fish is 1.40m below surface, and the spear travels in a straight line all the w..
Speedboat A negotiates a curve whose radius is 115 m. Speedboat B negotiates a curve whose radius is 194 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
What is the smallest radius of an unbanked (flat) track around which a bicyclist can travel if her speed is 21 km/h
what is the magnetic field between the rails. A lead ball is dropped into a lake from a diving board 6 above the water. After entering the water, it sinks to bottom with a constant velocity equal to the velocity with which it hit the water. The bal..
define How much charge is on each plate.
Mary needs to row her boat across a 120{\rm m} -wide river that is flowing to the east at a speed of 1.5{\rm m/s}. how far downstream will she land
A severe thunderstorm dumped 2.4 in of rain in 30 min on the town of area 21 km2. What mass of water (in kg) fell on the town? One cubic meter of water has a mass of 103 kg.
A long cylindrical wire of radius R carries a current I. Let the z axis be a long the axis of the wire. The current density of the wire is j=1/pir^2. Find the current within the cross section of the wire or radius r
A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor, How tall is the tower
A tetrahedron has an equilateral triangle base with 18-cm-long edges and three equilateral triangle sides. The base is parallel to the ground, What is the electric flux through the base
A 9.7 g object moving to the right at 11cm/s makes an elastic head-on collision with a 14 gram object moving in the opposite direction at 47 cm/s
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