Anonymous asked: How can I be a writer on sayitwithscience?
At this moment, we’re not sure if we can immediately recruit someone new to the team. There are a few things, however, that you can do to show us your interest:
- Email us! Message us (non anonymously)! Let us know who you are! Tell us about your science interests!
- Write posts you would like to submit. You may then submit them to us via the submission box! If you let us know beforehand, we can guide you through the process. Remember: they must be original work and must include links to any sources you use.
- Provide general feedback and comments.
If things end up going great, you may land yourself a position on the team! Thank you for your interest! This message put a smile on our faces. (:
-Say It With Science
∑ F = ma
… is a differential equation:
where acceleration a(t), velocity v(t), and displacement s(t) are all vectors and functions of time. This equation is second-order in position because the highest derivative is the second time derivative of position. Combined with the right boundary conditions, s(t) (also called the trajectory: path through space and time) can be determined.
This differential equation can be solved one component, or dimension, at a time. Let us focus on one of these, and call it the x component. The equations for y and z can be found exactly the same way.
If the graph of a(t) signifying acceleration in the x direction is constant
then the graph of v(t), the velocity in the x direction, is a straight line with slope a0
and the graph of x(t), the position along the x axis, is a parabola
It is also possible for the acceleration, or either of the initial velocity or initial position, to be negative. Thus the displacement/projectile motion formula is derived.
The contributors have been on a bit of a break, but we’ll be back soon with a new batch of posts. In the meantime, we’d like to get to know our readers!
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