I've been practicing this for a while and my answers are wrong compared to the memo. I want to see detail solution please help me out I'm practicing for my exam

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?

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?

Which of the following statement is false