What was changed and why in the "elasticity" lab?

temperature to see how it affected stretch length of a rubber band

rubber band length to see how it affected mass

mass to see how it affected stretch length of a rubber band

mass to see if you could break a rubber band

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.