A (massless) spring-launcher with spring constant k= 900M is located above the ground. If we put a ball
of mass m = 0.8kg into the launcher, compress the
spring by x= 0.2m, and the ball starts at a height of
8m (after compression). Disregarding air resistance,
what is the ball's speed on impact with the ground? Will
the orientation of the launcher affect the impact speed?

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?

Occurs when an energy source transfers heat directly to another subject space; an example would be an object becoming warm by sitting in the sunshine

You have a pick-up truck that weighed 4,000 pounds when it was new. you are modifying it to increase its ground clearance. when you are finished