Compare and contrast a period of revolution and a period of rotation plz answer

Sorry i don’t know what to do

Sublimation- which change of state is shown in model

Answermuscle strength;

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.