A box having a weight of 8 lb is attached to a massless rod with length 2 feet. The initial speed of the box is 5 ft/s. Neglect friction and size of the box. If a moment of 10 ft-lb causes the box to increase its velocity from 5 ft/s to 10 ft/s, determine: rictly no di without written permissTON. a) The time it takes for the box to go from 5 ft/s to 10 ft/s b) The total work done during the time that the box goes from 5 ft/s to 10 ft/s c) The tension in the rod when the box has reached 10 ft/s

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.