... in detail, including its application for calculating space velocities and for interpreting lunar tides and various geophysical phenomena -Physics for Everyone Book L.DLondou A, I Kitoigorodsky ... the stream of raindrops seems to slant Force Is a Vedor Force, just as velocity, is a vector quantity For it always acts in a definite direction Therefore, forces should also be added according ... resistance on the part of the water Therefore, in order for a boat" to move forward, it is necessary that the force pressing on the sail should have a forward component along the keel line This...