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Physics 9 Online
OpenStudy (anonymous):

A block rests on a horizontal, frictionless surface. A string is attached to the block, and is pulled with a force of 76 N at an angle θ above the horizontal. After the block is pulled through a distance of 10.0 m its speed is v = 3.10 m/s, and 570.0 J of work has been done on it. What is the angle θ?

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