How does acceleration depend on the net force? ?

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

In the first law of thermodynamics, triangle e=q-w, what does q stand for