either mass to start accelerating? (First explain why, or write an equation to s

Question

either mass to start accelerating? (First explain why, or write an equation to show why, the tension in the cord is half of F, even though D is accelerating.) This part is considerably less than half the problem; if you do only (a), you may not count 1/2 on the problem. Suppose that force F is 980 Newtons (= 100 g). Find the acceleration of B relative to the earth (aB/E), and find aC/E. Find accelerations atve, aD/E, aB/D, and aC/D. You need to draw a displacement diagram here and figure out how aD/E is related to aB/E and aC/E. On the Martian canal, Rimini, none of the gondolas is quite able to support the weight of both Palo and Francesca, two affectionate and overweight Martians, who refuse to cross the canal in separate gondolas. The enterprising gondolier suspends P and F as shown (weightless pulleys and cords) and ferries them across quickly before they her either the crossbeam or the deck. How much is his load reduced by this arrangement? On mars, g = 3.72 m/sec2. (You can look up the real and unhappy story of Francesca da Rimini (put to death ca. 1285); it figures in poems and plays.) A constant horizontal force, F, acts on car m3. Mass m1 = 5 kg, m2 =4 kg, and m3 = 21 kg. What is force F if mass m1 does not

Explanation / Answer

t-60*3.72=60a------1 90*3.72-2t=90a-----2 from 1 and 2 a=-.531 t=191.314N total load will be 3t=3*191.314=573.942 N..... load reduced=90*.531-60.531=15.93

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