A 48.6 kg ice skater is moving at 2.61 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then
moves in a circle of radius 0.718 m around the
pole.
Find the force exerted by the rope on her
arms. The acceleration of gravity is 9.8 m/s
2
.
Answer in units of kN.

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.

What kind of simple machine is a catapult?

Which composition of water moves to begin a deepwater current?