Recent content by wein7145

By setting the units to Newtons 1 can equal X many cm stretched. We did this in the 2nd part of book. But you are right a conclusion can't be made unless it is proven, I'm just saying this: By using a spring scale measure the force at 1 rubber band per x length vs rubber band at 3 times the cm...

Yeah I said mass/weight not lbsF or ftlbs or inchlbs. Good that you agree and thanks again for your help. Nah the teacher seems okay when you have a basic understanding and attempt to do ALL the work assigned vs not doing it. It doesn't have to be correct as long as it is backed up by...

Homework Statement Not surprisingly there is an old forum post on this topic: https://www.physicsforums.com/threads/proving-force.46215/ However it doesn't contain the answer. Reposted: Two physics students are having a debate about the best way to define a force scale using rubber bands. Each...

Yes like how pounds = kilograms but both are classified as "weight/mass units" instead of totally different unit types like length units vs mass/weight units. The equal sign does imply that they are equal but I don't think they are. Well wolfram alpha says this they are all physical quantities...

Homework Statement Newton’s second law says F->net=ma->. So is ma-> a force? Explain. -> is a top bar arrow. Homework Equations F=ma or Fnet=ma The Attempt at a Solution (F) is a force and (m) is mass and (a) is acceleration. I don't really know what else this question is asking...

Whoops your right they are kg (Kilograms) But does everything else look good?

Homework Statement 1) A block lies on a horizontal friction-less surface. A horizontal force of 100 N is applied to the block giving rise to an acceleration of 3m/s^2. (a) Determine the mass of the block. b)Calculate the distance the block will travel if the force is applied for 10s...

OH Whoops yeah that's right m/s is speed and m/s^2 is acceleration. But back to the main question Maybe that is what the book is trying to teach I understand that. Which means there is ambiguity yes that answers part of the question. That answers the other part of the question. Thanks for the...

I'm pretty sure that it decelerated by 1m/s yes it still is positive but decelerated. 10m/s to 11m/s is acceleration by 1m/s. Oh...which one is right the book says something about acceleration is positive if velocity over time is more positive or less negative than initial velocity and...

Homework Statement What does it mean to say that an object undergoes a deceleration? Can this term be used without ambiguity? Edit (That was straight from the book poorly written: Should say object decelerates not undergoes a deceleration) Homework Equations v(t)=v0+a⋅t The Attempt at a...

OH 5mph+65mph-(end of interval which means final velocity)=70mph/2=35mph avg velocity so initial is 5mph.

well 35mph+95mph=130mph/2=65mph so is that correct initial speed is 95mph?

Okay I wrote the equation wrong. I mean the fill out sheet says to say "any relevant equations" (which I don't know because the teacher doesn't teach.) That is word for word the exact question. I said the same thing "how do I solve this?" and "why is this question not already on the internet?"...

Edit Background: The teacher doesn't teach we just do activities and have whole chapters worth of 20 mini assignments due every few days. Yes I did read the book found nothing. 1. Homework Statement The average velocity of a car over a certain time interval is 35 mi/h. If the velocity of the...

Yes I agree speed and graphs with slope describe this concept better. (Although technically the slope is zero) Going through my mistakes helps me remember and avoid making the same mistakes again. Thank you for the help. Strange how the book doesn't have answers to these conceptual questions...