Aball on the end of a string is whirled around in a horizontal circle of radius 0.273 m. the plane of the circle is 1.31 m above the ground. the string breaks and the ball lands 2.87 m away from the point on the ground directly beneath the ball’s location when the string breaks. the acceleration of gravity is 9.8 m/s 2 . find the centripetal acceleration of the ball during its circular motion. answer in units of m/s 2

This problem has been solved! see the answera non-uniform fire escape ladder is 6.0m long whenextended to the icy alley below. it is held at the top by africtionless pivot, and there is neglibible frictional force fromthe icy surface at the bottom. the ladder weighs 250n, and it'scenter of gravity is 2.0m along the ladder from the bottom. amother and child of total weight 750n are on the ladder 1.5m fromthe pivot. the ladder makes an angle θ with the horizontal.find the magnitude and direction ofa) the force exerted by the icy alley on the ladderb) the force exerted by the ladder on the pivotc) do your answers in part a and b depend on the angle?

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j