newtons second law
2006-08-18 06:26:44 · 3 answers · asked by thilak r 1 in Science & Mathematics ➔ Physics
gravity and air resistants
2006-08-18 06:32:42 · answer #1 · answered by the4nhustla 2 · 0⤊ 0⤋
The body is subjected to TWO forces:
- the one exerced by gravity (giving an acceleration of 9.81 m/s^2), which is a constant and does not depend on the speed,
- the resistance (or viscosity) of the air. This force, acting upwards, counters the force of gravity, and increases as the speed of the body increases, by the square of the velocity relative to the air.
Should the speed through the air is very fast, you can add a thermal effect due to friction of the air on the body (think of the shuttle re-entry)
2006-08-18 06:57:03 · answer #2 · answered by just "JR" 7 · 0⤊ 0⤋
weight , friction and if the body is attached to something with a a string then tension in the string. and also the acceleration due 2 gravity
2006-08-18 06:37:51 · answer #3 · answered by ani 2 · 0⤊ 0⤋