416 reputation
210
bio website agooddayinabadtown.com
location Boulder, Colorado, USA
age 21
visits member for 1 year, 10 months
seen Apr 17 at 22:36

I currently work as a database administrator for CU Boulder's Laboratory for Atmospheric and Space Physics.

I am also working on my BS in Engineering Physics with a minor in Computer Science at CU Boulder... because I didn't want weekends anyways. ;)


Dec
1
awarded  Yearling
Jan
23
answered Why can we say there is no tangential acceleration in this specific problem?
Jan
23
comment Why can we say there is no tangential acceleration in this specific problem?
Precisely. I will write this up as an answer and you can close this out... glad I could help!
Jan
23
comment Why can we say there is no tangential acceleration in this specific problem?
To clarify, if you are interested in only the exact instant shown above, then indeed each cart's tangential acceleration is the same (and is 0). This is because the tangential component of the acceleration due to gravity on cart 3 is in the opposite direction (tangentially) as cart 1 at this instant, and thus the net tangential acceleration due to gravity on the train at this instant is zero (therefore tangential acceleration on each cart is also zero since they are connected). At this instant, thus, the only acceleration is normal and equals v^2/r for each cart, as suggested.
Jan
23
comment Why can we say there is no tangential acceleration in this specific problem?
Are we to also assume that there is no gravity in this situation? If gravity is taken into effect, then the only point at which there actually isn't a tangential component of acceleration is at the very top of the loop.
Dec
21
answered Angular momentum power plant on Earth
Dec
20
reviewed Reviewed Rolling (without slipping) ball on a moving surface
Dec
20
suggested suggested edit on Rolling (without slipping) ball on a moving surface
Dec
20
awarded  Custodian
Dec
20
reviewed Reviewed First class and second class constraints
Dec
13
answered How to relate speed of sound with relative humidity?
Dec
11
answered Classical mechanics and the speed of a train-mosquito collision, when perfectly rigid bodies
Dec
6
awarded  Organizer
Dec
6
revised Temporal part of Quantum Wavefunction
improved formatting
Dec
6
suggested suggested edit on Temporal part of Quantum Wavefunction
Dec
5
awarded  Critic
Dec
5
awarded  Citizen Patrol
Dec
5
comment Projectile Motion with Air Resistance and Wind
Consider the system in the exact same manner as you would without wind resistance, and then draw a free body diagram and look at acceleration and forces on the projectile. The only thing that air adds to the scenario is the frictional force, always in a direction opposite the projectile's movement. Thus, you should simply change the free body diagram to include this force and re-calculate the horizontal and vertical components of acceleration. As to your confusion about v*vx, v is the magnitude of the projectile's velocity relative to the air, vx is the x component of this velocity vector.
Dec
5
answered Projectile Motion with Air Resistance and Wind
Dec
5
comment Projectile Motion with Air Resistance and Wind
If you are seeking an answer with a high degree of accuracy, this becomes a HUGELY complex problem dependent on multiple variables including shape of the projectile, pressure/temperature of the air, and a number of other factors. How precise an answer do you need?