Moving About Help (2 Viewers)

[ohexploitable]

No! I meant the ball was going +9.8m/s.

Umm... lol...

Kay, when the ball is going up, it's slowing down, hence accelerating (decelerating) at -9.8ms^-2.

 

[chrisnumber1]

That confuses me. Is that the average acceleration?
I don't think the question will be exactly written as that.

Sorry, just saying.

acceleration is a constant(for these questions anyways)

 

[s2 SEductive]

WHAT? Instantaneously or...?

Time to consult my textbook

Omg I can't believe you did this topic already. We do it in term 3 (most likely not going to finish)

Lol my teacher said
do the hard sub first , cuz it will eff u up LMAO
so learn it well, we're doing waves now
i kinda learnt it already
and i'v kinda learnt the electricity one in the long holidays

it would be instantaneous , because it's the velocity at 2 seconds

 

[ohexploitable]

It's slowing down constantly at a rate of 9.8ms^-1 every second, so after 2s it loses 19.6ms^-1.

 

[hscishard]

It's really gonna suck just doing average. I mean, if the ball has some micro chip in it, it can accelerate 8m/s for a second, then accelerate 6m/s for the second second. Thus the average acceleration is 7. Which is the same as just accelerating 7m/s for two seconds.

I hate it when I confuse myself

 

[hscishard]

It's slowing down constantly at a rate of 9.8ms^-1 every second, so after 2s it loses 19.6ms^-1.

I was thinking of that. Makes logic sense, just perhaps not scientifically.

 

[hscishard]

acceleration is a constant(for these questions anyways)

Can't wait to learn Motion in 2unit maths

 

[s2 SEductive]

It's really gonna suck just doing average. I mean, if the ball has some micro chip in it, it can accelerate 8m/s for a second, then accelerate 6m/s for the second second. Thus the average acceleration is 7. Which is the same as just accelerating 7m/s for two seconds.

I hate it when I confuse myself

it's different

for average Acceleration it's

a = v-u/t

in words... acceleration is equal to change in velocity over change in time.

v is final velocity
u is initial velocity

a = 7-8/2 -1

= -1 m/s/s towards somethings.. like north
or u can removes the - and change the direction to positive(+)

= 1m/s/s South

Instantaneous velocity is just like the velocity was 7m/s at 2 secs
and for instantaneous acceleration , you would have to draw a velocity versus time graph and determine the slope by drawing a tangent to the point or derivative in calculus terms.

Lol dw
you'll learn it , i'm making it sound too hard

 

[hscishard]

I said accelerating. Lol not velocity.

 

[s2 SEductive]

I said accelerating. Lol not velocity.

yeh i wrote about instantaneous acceleration

 

[hscishard]

yeh i wrote about instantaneous acceleration

I know, The 8m/s stuff was acceleration.

Dw, I'll get it cleared up when we learn moving about

 

[s2 SEductive]

I know, The 8m/s stuff was acceleration.

Dw, I'll get it cleared up when we learn moving about

yep then you'll own me >.<

 

[hscishard]

...?

 

[s2 SEductive]

dw...

 

[hscishard]

...

 

[hscishard]

My posts are going up

 

[s2 SEductive]

baha , i'm trying to post more !!

 

[Chrissiieee]

physics is aewsome guize
you'll love it