Recent content by galuda

Well they want the answer in ft/s^2 which is why I didn't convert to meters, but I've also tried it using your last posted method prior to asking for help and that doesn't work either. I think the question is just worded poorly, because I've tried it every way I can think of trying to make the...

Homework Statement Secretariat ran the Kentucky derby with time for the quarter mile of 25.2s, 24s, 23.8s, and 23s. Assuming that secretariat's instantaneous speed at the finish line was the same as the average speed during the final quarter mile, find his average acceleration for the entire...

oh thank you, that worked perfectly

Homework Statement A rocket is fired vertically, ejecting sufficient mass to move upward at a constant acceleration of 2.86g. After 50.2s, the rocket motors are turned off, and the rocket subsequently moves under the action of gravity alone, with negligible air resistance. Ignoring the...

yes that worked thank you very much

oh so I just need to subtract the planet's radius from my answer?

[SOLVED] radius of synchronous satellite from a planet Homework Statement A "synchronous" satellite, which always remains above the same point on a planet's equator, is put in orbit about a planet similar to Jupiter. This planet rotates once every 7.8h, has a mass of 1.8e27kg and a radius of...

AHAH! Well I decided to use the degree, radius and velocity from the previous 2 problems, found my force of the original speed that required no friction, added 14km/hr to it and found that force, then subtracted one from the other and that answer was correct. Would have been a whole lot simpler...

Now the question doesn't say to refer to the previous problem, but if it does it was If r = 51 m and v = 52 km/hr, what is theta? and i found that to be 22.646 degrees. Can we do anything with that information?

Yup, that's all it says, other than answer in units of N at the end. Doesn't even say if it's a flat curve or banked.

Homework Statement With what frictional force must the road push on a 1200 kg car if the driver exceeds the speed for which the curve was designed by deltav = 14km/hr? The Attempt at a Solution I actually have no clue where to begin with this question. Don't I need the radius to figure...

oh man I'm such an idiot. That would be the problem.

that would be sqrt of 2ax since vi is 0, but that answer comes out to 7.068 which is wrong so i must have my acceleration wrong

Homework Statement A block starts from rest at a heigh of 8m on a fixed inclined plane. The acceleration of gravity is 9.8m/s^2. What is the speed of the block at the bottom of the ramp? Answer in units of m/s. Block mass = 4.5kg coefficient of friction = 0.19 Angle of incline = 29...

Yeah, i don't get it either.