|got some physics y'all||October 6, 2014, 4:07 pm|
1- A car, initially going eastward, rounds a 90 degrees curve and ends up heading southward. If the speedometer reading remains constant, what's the direction of the car's average acceleration vector?
2- A plane with airspeed 370 km/h flies perpendicularly across the jet stream, its nose pointed into the jet stream at 32 degree from the perpendicular direction of its flight. Find the speed of the jet stream.
3- An object undergoes acceleration 2.3i + 3.6j m/s^2 for 10 s. At the end of this time, its velocity is 33i + 15j m/s. What was its velocity at the beginning of the 10 s interval? By how much did its speed change? By how much did its direction change? Show that the speed change is not given by the magnitude of the acceleration multiplied by the time. Why not?
4- A particle leaves the origin with initial velocity v0 = 11i + 14j m/s, undergoing constant acceleration a = -1.2i + 0.26j m/s^2. When does the particle cross the y-axis? What's its y-coordinate at the time? How fast is it moving, and in what direction?
5- A jet is diving vertically downward at 1200 km/h. If the pilot can withstand a maximum acceleration of 5g before losing consciousness, at what height must the plane start a quarter turn to pull out of the dive? Assume the speed remains constant.
|University - Day 1||September 8, 2014, 8:22 am|
|So much "free" time (1-2 hours) that I hate to sit lonely in public, so I went/hid in the library which is a very friendly environment for spending time yourself. This is gonna be boring if I'm going to do this everyday.|
|If y(t) = 100e ^ 0.1t then the doubling time is...||August 23, 2014, 1:55 pm|
Also how is doubling time calculated in general.
|Anyone here wanna chat?||August 5, 2014, 6:29 pm|
|I'm spending all of my time at home, either I roll the chair around, or work on a video game, or watch some TV shows, and sometimes have a walk by myself. I'm kinda bored. Anyone?|
|3.578 years on Doomworld||August 1, 2014, 3:58 pm|
I quit Doom.
I quit mapping.
I now discuss everything but Doom on the forums.
Am I growing up?
|Physics Problems||July 29, 2014, 4:33 pm|
1- A toy racing moves with constant speed around the circle shown below. When it is at point A its coordinates are x = 0, y = 3m and its velocity is 6 m/s i. When it is at point B its velocity and acceleration are (respectively)?
The answer is 6 m/s j and 12 m/s^2 i, respectively. I got the magnitudes right, and I understand why its velocity is in the direction of j. However, why is its acceleration is in the direction i?
2- Two blocks (A and B) are in contact on a horizontal frictionless surface. A 36-N constant force is applied to A as shown. The magnitude of the force of A on B is?
3- A 0.20-kg particle moves along the x axis under the influence of a stationary object. The potential energy is given by U(x) = (8.0J/m^2)x^2 + (2.0J/m^4)x^4, where x is in coordinate of the particle. If the particle has a speed of 5.0 m/s when it is at x = 1.0 m, its speed when it is at the origin is?
(Any relations between potential energy and speed?)
|A Unity Game||July 17, 2014, 8:10 pm|
So I've been developing a very simple game on Unity. The basic idea is to avoid spawning obstacles controlling 4 ships. My current aim is to finish all the scripting before importing assets, that is why everything you see in the video is a cube.
Might not look attractive, but this is my first good attempt to make a video game. I still have to script spawning obstacles, score and other few necessary stuff. What do you think?
|Uni is approaching...||July 2, 2014, 4:57 am|
|... and I'm still stuck between CS and CEN as majors. I'm mainly aiming for CS as major and accounting as minor. But what do you think? Which major should I get? Which is better? Which one has bigger salary?|
|Do things get better after teenage?||April 21, 2014, 2:13 pm|
|I'm not totally depressed, but I keep getting weird random thoughts in my mind, and sometimes, I feel a little anxious in a few situations which is kind of ridiculous. There are also other stuff I go through other people do not. Point is, is this just me, or am I going through typical teenage?|
|Attempt at animation rigging||April 16, 2014, 4:21 pm|
animating is fun, right???