2 students ride a slingshot. The slingshot catapults 2 students at a time vertically 365 feet in an amount of time proportional to their mass. If 2 small students, each with a mass of 150 pounds were to ride, what would be their respective accelerations, converted to miles per hour per second, if the Force the slingshot produces is a constant 20,000 Newtons?

I use the A=F/m equation, but am not sure how or if the 365 feet distance in the air comes into play.

yes, a = F/m

the units are a mess of course :(
remember force up = m g + m a
you need mg up just to hold them