When in deep space the block accelerates at 4.2 ms2 even as, Ask an Expert

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Q1. When in deep space, the block accelerates at 4.2 m/s^2 even as a 120 N force is applied to it. The coefficient of static friction for a particular plane and this block is 0.31. What angle can this plane make with horizontal before the object starts to slide?

Q2. A wrecking ball is suspended from a 10.0m long cable that makes a 30 degree angle with the vertical. The ball is released and swings down. What is ball's speed at the lowest point?

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