What is the total work done by a ball thrown 100m straigh up into the air?

Awoodchuck would chuck all the wood he could chuck if a woodchuck could chuck wood.

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.

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