Aparticle moves along the x axis according to the equation x = 2.08 + 3.06t − 1.00t^2, where x is in meters and t is in seconds. (a) find the position of the particle at t = 3.30 s. (b) find its velocity at t = 3.30 s. (c) find its acceleration at t = 3.30 s.

Why does the input force have to be greater than the force needed to lift the bale?

Explain why electric current cannot exist if a current doesn't have a voltage source.

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.