Just a quick question everyone. It's annoying me quite a lot as I used to know it, but I've not done physics for over a year and I'm getting quite rusty. My question concerns a car under braking, and how the its velocity is reduced. As I understand it, the frictional forces generated by the...
It's unfair to say it's the most-respected (or words to that effect), but I certainly enjoy it much more than the others.
It has the ability to be mind-numbingly difficult and be incredibly interesting at the same time - thus it's so satisfying when you get it right :smile:
First off, sorry if this is the wrong forum but I wasn't sure where else to put it. Secondly, this will be just an interest because I've already applied to and chosen by university degree courses so I'm not considering a career in aerodynamics.
I want to start out with just understanding the...
I've read a piece on his theory and I'm having a little difficulty understanding it. I've used the famous E = MC^2 in calculations before but I want to have more understanding of the theory behind it.
Any info would be great.
Ah right, now that makes sense. I'll be sure to apply it to the my future moments and equilibrium problems. I suppose if I look at the whole moments thing as a circle, and since the weight of the ladder was already creating a clockwise moment then there would have to be a force acting the other...
With question 5 I don't understand how the force R creates a moment when the pivot is point A. The part I'm having difficulty with is identifying the clockwise and anti-clockwise moments on the pivot.
Hello all. I'm not sure if this is the correct forum because I'm in the UK and I don't know what "Grade K12" is, but the sort of stuff in this forum seems to be the type of work we're doing.
We've just started some work on moments and equilibrium and I'm having difficulty solving the...
Yeah, velocity is a vector so has magnitude and direction where as speed is a scalar and has magnitude only.
Speed = Distance/Time
Velocity = Displacement/Time
Since the acceleration of the rock is uniform i.e under the affect of gravity, couldn't you use the equations of motion?
u=0, a = 9.81, t = 3.4
s=ut+0.5xat^2
s=0.5*9.81*3.4^2
s=56.7m
I know that's not the information he was given but would it work? The only assumption I've made is...