Download ES201 Homework Set #9    Problem 9.1  A small, traveling video camera used to cover NFL games is suspended by two cables as shown in the  figure. The camera weighs 120 N. For purposes of analysis, you may assume the cables have negligible 

ES201 Homework Set #9 Problem 9.1 A small, traveling video camera used to cover NFL games is suspended by two cables as shown in the figure. The camera weighs 120 N. For purposes of analysis, you may assume the cables have negligible mass, so they hang “straight” as shown in the figure. For the camera position shown in the figure, determine the tension in the cables, in N, under three different operating conditions: (a) the camera is stationary, (b) the camera is traveling to the right with a constant velocity of 1 m/s, and (c) the camera is accelerating to the left at the rate of 4.9 m/s2. [WARNING: DO NOT START WITH F=ma. Start with conservation of linear momentum and construct a solution.] 200 m
70 m
50 m Problem 9.2 A rocket sled with a mass of 1000 kg travels horizontally with a constant speed of 400 m/s. The sled is to be slowed down with drag chute that provides a drag force of Fdrag = kV2 that opposes the direction of motion, where k is a constant with units of N‐s2/m2. During the braking process the only significant force acting on the sled is the force from the drag chute. (a) Determine value of k, in N‐s2/m2, required to slow the sled from 400 m/s to a speed of 40 m/s over a distance of 1000 m. (b) Determine the acceleration of the sled, in m/s2, immediately after the drag chute is deployed. (c) Determine the time, in seconds, required to slow the sled as described in Part (a).