Recent content by mst3kjunkie

Here are the three problems I'm having trouble with:

okay, now I"ve gotten it to (25/2)m+(1/3)mr^2(omega)^2 = 9.8mh am I on the right track?

I've used Conservation of Energy before, but I haven't encountered the translatoral (at least the term) or rotational energy formulas yet.

I'm a bit unsure as to how to set up the formula, still.

that was a mistake on my part. I meant to put velocity, not angular velocity.

the first and the second:

49. You have been hired to design a spring launched roller coaster that will carry two passengers per car. Te car goes up a 10m high hill, then descends 15m to the track's lowest point. You've determined that the spring can be compressed a maximum of 2.0 m and that a loaded car will have a...

solved. ( ten character minimum )

The system shown in the figure is accelerating. Asume that there is no friction anywhere in the system and that the mass of the string can be neglected. The values of the masses are: m[SIZE="1"]1=5.00 kg m[SIZE="1"]2=8.00 kg Determine the acceleration of the system. Figure and work done so...

47. In an amusement park ride called the Roundup, passengers stand inside a 16m diameter rotating ring. After the ring has acquired suficient speed, it tilts into a vertical plane. a. suppose the ring rotates once every 4.5 s. If a rider's mass is 55kg, with how much force does the ring pus...

Figured it out. since the velocity in the y direction is 0m/s at t=2s, I was able to calculate the gravity. I then used this to find the velocities at the other times. I don't know if using part b to solve part a is correct, but I can check my instructor's webpage to see if it gets the...

8. A Physics student on Planet Exidor throws a ball, and it follows the parabolic trajectory shown in Figure 6.8 (whille it will not be recreated on this forum, the figure shows a part of a parabolic curve which starts at the origin and peaks at t=2. It also shows the velocity vector at t=1...

solved problem.

18. A particle starts from rest at r[SIZE="1"]0=9.0 j(unit vector) m and moves in the xy-plane with the velocity shown in the figure below. the particle passes through a wire hoop located at r[SIZE="1"]1=20i m, then continues onward. a. At what time does the particle pass through the hoop...

thank you so much. I completely forgot to take gravitational force into account. This solves my problem.