What is the ideal mechanical advantage if Sam pushed a box 27 m up an incline plane to lift a box 9 m up on a truck bed?

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.

Answervery high orbital velocities in a very compact region;