How does the force affect the rocks during collisions? *

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?

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

This is the substance(s) formed in a chemical reaction.