Aroller coaster starts at the top of a straight track that is inclined at 30degrees with the horizontal. this causes it to accelerate at a rate of 4.9m/s^2(1/2g).

a. what is the roller coaster's speed after 3 seconds?
b. how far does it travel during that time?

This is the substance(s) formed in a chemical reaction.

Select all that applywhat are some basic resources a family is expected to provide for children? educationclothesspending

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.