Consider a skydiver of mass 70 kg who jumps from an air- plane flying at an altitude of 1500 m. With her parachute open, her terminal velocity is 8.0 m/s. (a) What is the work done by gravity and (b) what is the average force of air drag during the course of her jump?

What is the maximum acceleration of the wing tips, in units of g?

Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.