A Wilson volleyball falls vertically from the initial height of 2.1 m with no initial velocity to the floor and bounces vertically, reaching the highest point 1.7 m from the floor as illustrated. Take the origin of the potential energy of the ball to be that on the floor. The mass of the ball is 0.120 kg. What is the velocity of the ball just before hitting the floor?
What is the magnitude of the impulse on the ball from the floor when the ball bounces?
The ball is in contact with the floor for 0.07 seconds. What is the average force F exerted on the ball by the floor?
How much kinetic energy is lost in the collision

1point) a skydiver weighing 130 lb (including equipment) falls vertically downward from an altitude of 14,000 ft and opens the parachute after 20 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.85|v|0.85|v| when the parachute is closed and is of magnitude 17|v|17|v| when the parachute is open, where the velocity vv is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. find the speed of the skydiver when the parachute opens. speed is 150.6121788 ft/s find the skydiver's height when the parachute opens. height is 2338.98591 ft find the limiting velocity vlvl after the parachute opens. (think about whether this should be positive or negative.) vl=vl= 7.647 ft/s

Which of these metals are magnetic?

Sunidhi made a study chart about changes in states of matter. which headings best complete the chart?