Question 14: A ball dropped from a bridge strikes the water in 9.8 s. Calculate (a) the speed with which it strikes the water, and (b) the height of the bridge. (a) V = (b ) x = Question 15: Electrons move through an electrical circuit component at an average speed of 2.3x 10-2 m/s. How long (in minutes) does it take an electron to traverse a 2.2 m light bulb filament coil? t = Question 16: A marble with speed 38.3 cm/s rolls off the edge of a table 55.5 cm high. How long does it take to drop to the floor? How far, horizontally, from the table edge does the marble strike the floor? t = X= Question 17: The data in the following table describe the initial and final positions of a moving particle. The elapsed time for each of these pairs of data is 0.66 5. Determine the average velocity for each of the three data sets. Initial Position x_0 (m) Final Position x (m) (a) 2 7.1 (b) 6.6 3.5 (c) -1.4 7.1 (a) v = (b ) v = (c) v =