A7.0-kilogram cart, a, and a 3.0-kilogram cart, b, are initially held together at rest on a horizontal, frictionless surface. when a compressed spring attached to one of the carts is released, the carts are pushed apart. after the spring is released, the speed of cart b is 6.0 meters per second, as represented in the diagram belowwhat is the speed of cart a after the spring is released?

Asilver dollar is dropped from the top of a building that is 1324 feet tall. use the position function below for free-falling objects. s(t) = −16t2 + v0t + s0 (a) determine the position and velocity functions for the coin. s(t) = v(t) = (b) determine the average velocity on the interval [1, 2]. ft/s (c) find the instantaneous velocities when t = 1 second and t = 2 seconds. v(1) = ft/s v(2) = ft/s (d) find the time required for the coin to reach the ground level. (round your answer to three decimal places.) t = s (e) find the velocity of the coin at impact. (round your answer to three decimal places.) ft/s