1) for the given position of the windshield wiper shown below, calculate the angular velocities and accelerations of the both wipers, if the angular velocity of the input link, ac, is 1 rad/sec. ac=10cm, cd=40cm, bd=25cm, be=15cm, ef=80cm, fg=13cm, angle between the left wiper and the be is 20 degrees and the angle between right wiper and the fg is 25 degrees. de and gf is in vertical position while dc is horizontal position. the angle of link ac is -75 degrees from the horizontal line. any necessary unknown for the problem can be given by the student if can not be obtained from the given.
2.)extra credit question (4 credits) applicable to the end-of-the-semester grade: if you are allowed to choose the be/bd ratio (other than 3/5), what value should that ratio take in order to have wiping angle of 120 degrees
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