Which is a change in displacement over time?

A. average displacement
B. average speed
C. average acceleration
D. average velocity

***I'm not too sure, but would it be average velocity? :/

Question

Which is a change in displacement over time?

A. average displacement
B. average speed
C. average acceleration
D. average velocity

***I'm not too sure, but would it be average velocity? :/

nincompoop · Answer

OMG
that's simple velocity

anonymous · Answer

so it's not average velocity? if not, would it be average speed? :/

nincompoop · Answer

you can't simply say average, because at lim x-> 0, it would be in the same sense as average, but would be better referred as instantaneous

nincompoop · Answer

speed is synonymous with velocity
the difference is that speed is scalar (magnitude only) and velocity is vector (magnitude and direction)

anonymous · Answer

ohh okay:)

so it should be simple velocity? what would be the best choice since they all say average? :/

nincompoop · Answer

have you taken calculus yet?

anonymous · Answer

yes:)

nincompoop · Answer

then you know average vs instantaneous?

anonymous · Answer

i think so? 

average=over time
instantaneous=in particular moment

?

nincompoop · Answer

right
but that particular moment is not zero, and since it is not zero, like I said earlier is in the same sense as average. it is just very very very very very very small
in this sense the smallness is relative to from where to where

nincompoop · Answer

moving on
next question

anonymous · Answer

okay:) so in regards to this question, it is speed? or acceleration?

nincompoop · Answer

acceleration is a change in velocity over a change in time

nincompoop · Answer

acceleration, just like velocity, is a vector

anonymous · Answer

okay:) wait, so it's acceleration? :/

anonymous · Answer

confused iheartfood haha

ganeshie8 · Answer

velocity : change in displacement over time
acceleration : change in velocity over time
jerk : change in acceleration over time
??? :  change in jerk over time
...

nincompoop · Answer

no... because what you're given is a change in displacement over a change in time 
that is your definition of velocity

anonymous · Answer

ahh okie yay!! thanks!! :D

nincompoop · Answer

I think you're making us give you the answer, which is not good

nincompoop · Answer

I would refer you to some of the physics textbooks that I used in class and have uploaded online

anonymous · Answer

no, i am trying to understand but got a bit confused! but your explanations helped a lot and i will try to remember which thing means what!!:)