Recent content by hjr

yea so these are the equations i was given. When i make sin = 0 i can make it work but when cos = o i can't figure out how to get rid of k.

Yeah i should of been more clearer, A and phi were already given. I have to prove that the equation is valid for any time t. I did it for t = -phi/w which I was able to show/prove that it does work. Now when i do t=(pi/2-phi/w) i get the solution above but I can't figure out how to get rid of k...

Homework Statement By substituting the proper equations I showed that the equation is right when time = phi/w. Now when I make cos = o and sin = 1 and time = (pi/2 - phi)/w I can't solve the equation. Homework Equations If you need to see all the equations i can give it to you but I am...

alright thanks

so when I find g is that all i have to find? ->for the external force?

*bump*

Homework Statement A rocket traveling 1950 m/s away from the Earth at an altitude of 6600 km fires its rockets, which eject gas at a speed of 1300 m/s (relative to the rocket). If the mass of the rocket at this moment is 2.25×104 kg and an acceleration of 1.4 m/s^2 is desired, at what rate...

first time posting Homework Statement Christian is making a Tyrolean traverse as shown in the figure. That is, he traverses a chasm by stringing a rope between a tree on one side of the chasm and a tree on the opposite side, 23 m away. The rope must sag sufficiently so it won't break. Assume...