What creative thoughts did rømer have to explain his measurements

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?

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?