Suppose we have a class 1 lever, lifting a load of constant mass. All distances remain the same and the only thing that changes is the magnitude of the force applied (effort). Intuitively we know that the more effort (force) there is, the more force will be applied to the load and after a certain threshold, the load will be launched into free flight.
From Newton's Second Law, we have F=m*a. If the mass of the object stays the same, then the more force, the more acceleration.
However, the force applied (effort) is also an m*a, correct? Then, if we need let's say 500N to catapult the object, we could say that this number could come by a force of mass 10 and acceleration 50, or by another force of mass 5000 and acceleration 0.1. (or is this totally wrong?)
Again, intuitively this should be wrong since depending on the speed/acceleration of the force applied different situations occur. For example, I can imagine a sufficiently quick motion of mass double the size of the load, catapulting the object but I can't imagine a huge mass moving or accelerating incredibly slowly having the same result. The load will just sit on and move together with the arm on the lever and never develop enough speed in order to fly.
I thought that conservation of momentum must be involved because it relates time, mass and speed but I don't know how exactly to think about it.
F=m*a, a=v/t => F=m*v/t => F*t=m*v (hence the more time you take to apply the force, the less force you need for the same change of momentum, correct?)
How are all these related? so I can draw conclusions like: given a threshold of mass, the more acceleration, the more force. Or given a certain amount of time, the more mass, the more force, etc.