A turntable that spins at a constant 73.0 rm rpm takes 3.60, Ask an Expert

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Q. A turntable that spins at a constant 73.0 {rm rpm} takes 3.60 {rm s} to reach this angular speed after it is turned on. Find its angular acceleration (in {rm rad/s^{2}}), assuming it to be constant, and the number of degrees it turns through while speeding up.

Q. A new car is tested on a 300 m diameter track. If the car speeds up at a steady 1.2 m/s^2, how long after starting is the magnitude of its centripetal acceleration equal to the tangential acceleration?

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