Which one is not physical quantity question is mistake

Current enters a circuit at a: 1.positive terminal 2.negative terminal 3.low potential side 4.resistor

Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.