An elevator cabin is moving up, being pulled by an elevator cable under a tension of 8000N. mThe combined mass of four people in an elevator is 180 kg while the mass the elevator cabin itself is 195 kg. Find the acceleration of elevator cabin in the system of coordinates that has a positive vertical direction upward.

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I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.

If element x has 21 protons, element x has 21 electrons