What statement used during the scientific method is falsifiable or framed in a way that allow other scientist to prove it false

Assuming weightless pulleys and 100% efficiency, what is the minimum input force required to lift a 120 n weight using a single fixed pulley?

It is may 5 and you are somewhere in the northern hemisphere. if you determine that the noon sun is 51 degrees above your southern horizon, what is the latitude of your location

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is