an astronaut throws a wrench in interstellar space how much force is required to keep the wrench movie constantly with constant velocity

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Idon't understand is there supposed to be a list or something if there is pm or add in under this message i will do my best to .

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.