In Challenge Example 11.11 (p. 283), if the mass of the steel ball and the paperweight were the same (say 200 g), what would happen to both objects after they collide and the collision is perfectly elastic

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 happens when a rubber rod is rubbed with a piece of fur?

Coal contains energy. a. light b. kinetic c. chemical d. mechanical