Resistance to that of this is known.
- If a heavy Body be projected downward in a perpendicular Line; it descends therefore at the Rate 1⁄m, 1⁄mm, 1⁄m3, &c. of f, (the impressed Force) increased by 1⁄m, 1⁄m + 1⁄m2, 1⁄m + 1⁄m2 + 1⁄m3, &c. of g the impulse of Gravity, (by ¶ 7, and ¶ 27) Because both Forces are here united.
- If in a perpendicular Projection upwards; it ascends in the rate of the former, abated by that of the latter. Because here the impulse of Gravity is contrary to the Force impressed.
- When therefore this latter (continually increasing) becomes equal to that former (continually decreasing) it then ceaseth to ascend; and doth thenceforth descend at the rate wherein the latter continually exceeds the former.
In an Horizontal, or Oblique Projection: If to a Tangent, whose Increments are as FL , LM