Channel Slopes and Falling Balls: Doubling of Motion
Double fall gives double speed; which ball strikes harder - water behaves the same way
In red chalk and inverted, the leaf pairs a scheme of channels with a study of two balls in descent. It argues that the water f-b, at equal slope to c-a, will move at double the speed of c-a because the fall e-f is twice the fall d-c. Below, it asks which ball, b or c, delivers the greater blow at a-n, adding that water behaves in the same way.
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Water f b moves at double the speed of c a
In the scheme of channels labelled h e d g, a c and b f, the water f b at equal slope to c a is held to move at double speed, because the fall e f is twice the fall d c.
Which falling ball b or c strikes harder at a n
Two balls c b and n a are shown in descent, and the question is which gives the greater blow at a n. The note adds that water behaves in the same manner.