Chapter V. Mechanical Recreations.

Paradoxes on Motion 84
Laws of Motion 87
Force, Inertia. Centrifugal Force 87
Work. Stability of Equilibrium 89
Perpetual Motion 93
Models 97
Sailing quicker than the wind 93
Boat Moved by a Rope inside the Boat 101
Hauksbee's Law 101
Cut on Tennis-Balls, Cricket-Balls, Golf-BalJs 103
Flight of Birds 106
Curiosa Physica .• 107