An athlete had an ACL reconstruction. The athlete has decreased knee flexion. Given the structure of the joint surfaces, in what direction should you glide the tibia to facilitate knee flexion. Does this change if the femur is mobilized on the tibia

You throw a baseball directly upward at time t = 0 at an initial speed of 12.3 m/s. what is the maximum height the ball reaches above where it leaves your hand? at what times does the ball pass through half the maximum height? ignore air resistance and take g = 9.80 m/s2.

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.