Tagged Questions
-1
votes
1answer
101 views
Acceleration, velocity and speed
It is given that acceleration is constant, so can we infer that average speed and velocity are the same?? Moreover, circular motion is out of the question, as the function of x(t) where ...
2
votes
1answer
250 views
From how deep into space can a human “skydive” back to earth? [duplicate]
Possible Duplicate:
From how high could have Felix Baumgartner jumped without disintegrating like a shooting star?
If a human can skydive from an altitude of 24 miles (39 km), and a ...
-1
votes
2answers
1k views
How to find minimum velocity without time? [closed]
I have a physics problem that says
A 76.0-kg boulder is rolling horizontally at the top of a vertical cliff that is 20m above the surface of a lake. The top of the vertical face of a dam is ...
0
votes
2answers
350 views
How to compute drag coefficient given initial position, initial velocity and final resting position?
The equations I'm using are:
x = x + (DT * vx)
vx = vx * C
My DT is always 0.01 and the coefficient C (related to a linear ...
0
votes
1answer
555 views
Simple Harmonic Motion Question [closed]
I have two formulae:
Displacement = Amplitude * Cos(Angular Frequency * Time)
Velocity = - Amplitude * Angular Frequency * Sin(Angular Frequency * Time)
OR
$x = Acos(wt)$
$v = -A.w.sin(wt)$
And ...
0
votes
3answers
245 views
Deccelerate and Accelerate to achieve timed journey
I have a vehicle traveling at initial speed $100\:\mathrm{m/s}$.
Expected destination speed is also $100\:\mathrm{m/s}$.
Maximum deceleration is $3$.
Maximum acceleration is $10$.
Distance to the ...
3
votes
2answers
342 views
How much does it cost every time your car stops for a traffic light?
Every time we have to stop the car, it is costing us extra money, because we have to then accelerate to full speed again. I would like to know how much.
In order to simplify the situation, we can ...
