Apitcher throws a 0.35 kg ball, giving it an acceleration of 10.0 m/s. what would the acceleration be, if the pitcher threw the ball with twice the force?

What is a good example of instantaneous speed

How do we measure or think of speed in the united states?

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.