2 kg toy car moves at a speed of 5 m/s. B. If a child applies a 3 N force for 2 m in the same direction the car is already moving, how much work is done on the car?

c. What is the change in the car’s kinetic energy from the applied force?

d. What is the final kinetic energy of the car?

e. What is the velocity of the car after the child applies the 3 N force?

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.