If the angle of incidence= 60 degrees entering the block what is the angle of refraction

Why does the input force have to be greater than the force needed to lift the bale?

Jasmine is diving off a 3-meter springboard. her height in meters above the water when she is x meters horizontally from the end of the board is approximated by the equation h=-x^2+3x+3. what is the maximum height jasmine will reach on her dive?

In an experiment, how can i change human errors? be specific.