Due to a jaw injury, a patient must wear a strap (Figure 1) that produces a net upward force of 5.20 N on his chin.
The tension is the same throughout the strap.

To what tension must the strap be adjusted to provide the necessary upward force?
Express answer in newtons

Answer choices? if there is any

Inelastic is the answer your looking for.

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.