phys (1102) - Space: pendulum period formula

before we got stuck into more formula stuff, we first did a few HSC 2008 questions, which i did correct.

we talked about energy conversion in a rocket taking off.

chemical energy decreases, coz it is burnt up and converted to kinetic energy (which increases) and gravitational potential energy (which also increases)

even though its a negative value, it increases coz it gets closer to 0

as for kinetic energy, the movement of the rocket is because a net force acts on it, caused by the thrust of the engine.

if the rocket kept the same thrust, the rocket would keep accelerating, coz mass decreases, so for force to stay the same, acceleration increases (F = ma) full metal alchemist broz

so to slow down the rocket, the thrust is reduced (its important to keep an eye on acceleration coz some rocket equipment can die to pressure, so can people)

then we talekd about pendulums, the formula for period iiiiiisss..

T = 2(pi) root:(l/g)

yes thats crappy -.- but i have no symbols here haha.

and the gravitational force between any two masses isss..

F = G(m1m2)/r^2

yeah..

then we talked about weighto n other planets, which we did not finish this lesson