### What is the tension in cables

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Q1. A 0.27 kg rock is thrown perpendicularly upward from the top of the cliff that is 32 m high. When it hits the ground at the base of cliff, the rock has a speed of 29 m/s. suppose that air resistance can be ignored, find out A) initial speed of the rock and B) greatest height of the rock as measured from the base of cliff.

Q2. An 18 kg loudspeaker is suspended 2.7 m below ceiling by two cables that are each 70 degrees from vertical. What is the tension in cables?

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