A small 350 gram ball on the end of a thin, light rod is rotated horizontal circle of radius 1.2 m. Calculate a. the moment of inertia of the ball about the center of the circle and b. the torque needed to keep the ball rotating at constant angular velocity if air resistance exerts a force of 0.020 N on the ball. Ignore air resistance on the rod and it's moment of inertia.​

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

Which accurately compares concave and convex lenses?

Which branches of natural science include the study of an organism that lived 10 million years ago