Ok- so how about a little help??


Question

An object inatially at rest experiences an acceleration of 2.0m/s (squared) for 6.0 seconds and then travels at that constant velocity for another 8.0 seconds

A) At what speed is the object traveling 10 seconds into the motion?
B)How far has the object traveled in the 14 seconds of motion deicribed?

I don't know, draw a picture...?

Dude I run a 2f (Toyota)


Anyway, my wife taking this class, and has not been able to find a tutor is very frustrated.

She ended up calling my step father a software engineer (who has her even more confused)

I am unclear if you are describing arithmetic ({2m/s squared x 6}) or geometric acceleration. And the engineer on the train is wearing blue suspenders.

Tell her she needs a smarter husband.

All I know is you need to move the TV closer to the bathroom

I think some assumptions or info is missing. Do we assume zero friction, and zero coefficient of drag?

There are interactive physics discussions online where you could probably find some brainiac that could give you the answer as well as the formula used to get it.

Velocity is the derivative of acceleration. Position is the derivative of velocity. The object accelerates for 6 seconds. At the end of those 6 seconds; the object is at constant velocity. The speed at 10 seconds = the speed at 6 seconds. Total distance is the sumation of the distance travled during acceleration and the distance traveled during constant velocity. Follow your units and you will get it.

So 72m/sec. at the end of 6 seconds, and 720 meters and 1008 meters, then?

I haven't been in physics class in many years, if you couldn't tell.

I can't believe you bone heads don't know the answer.... .

I think my math is flawed.

What the hell do I care anyway..........I'm going fishing tomorrow.

18 m/s, 198 meters travelled.

Fish on...

Todd

You and Tony fishing with Fly tomorrow?

J7 is right.

There are two equations.

v = vo + at (velocity = initial velocity + acceleration x time). The trick is to only use the 6 seconds that the object accelerates.

x = xo + vot + (1/2) at ^2 (position = initial position + initial velocity x time + one half of accelleration x time squared).

Just keep the units in order, and make sure that she doesn't let the wording of the question confuse her (the t's in the second equation are different from one another). J7 pointed you in the right direction there. Master the units and you'll master physics.

Good luck.

Funny story about my physics class in college:

For an extra grade you could present to the prof a project/calculations of your own doing.

I did one on the flows of water in my apartment. I'm waiting outside the profs office and could hear the guy before me presenting his. It was on rocket propulsion. I'm thinking "great" I'm going to look like an idiot. The prof cuts him off and rips into him about plagirism and the student leaves all red faced. So i did my stupid kitchen and bathroom sink presentation and got an A.

Stlhead-

So are you saying it isn't who you know, it's how you flow?

Dammit, RR.

I don't see any answers.

I think my post was enough to officially classify me as a nerd, without being "that guy" on top of it.

Nerds become one of the cool group when they give the answers.