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block is suspended by a rope from the ceiling of an elevator that 21. A 5 kg sus accelerates downw ard at 3,0 m/s. The tension force of the rope on the block is: A) 15 N, up B) 34 N, up C) 34 N, down D) 64 N, up E) 64 N, down 22. A 90 kg man stands in an elevator that has a downward acceleration of 14 m/s. The force exerted by him on the floor is about A) ON B) 90N C) 760N D) 880N E) 1010 N 23. In the figure below, all the pulleys and strings are massless. If the system is in rest, what is the value of 0? (Note: The pulleys holding the blocks of mass m are free to move, while the other two pulleys are fixed in place) LLALLL A) 60° B) 90 C) 30° D) 120 E) 0 m/2
0 0
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