A 180 48.0 cm-diameter turntables rotate on frictionless, Ask an Expert

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Q1. A meter sticks in frame S' makes an angle of 36° with the x axis. If that frame moves parallel to the x axis with speed 0.61c relative to frame S, what is the length of stick as measured from S?

Q2. A 180, 48.0 cm-diameter turntables rotate on frictionless bearings at 70.0. A 15.0 block sits at the center of turntable. A compressed spring shoots the block fundamentally outward along the frictionless groove in the surface of the turntable.

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