mass of a paintball

[Ryan(pb alexandria)]

Lol amature..send it to me charles and I will look at it.

Forces in physics...pah, stick to your diffraction gratings.

 

[Luke W]

and this passes for school work nowadays??

School work?? Study leave ftw!

 

[Revolt]

Lol amature..send it to me charles and I will look at it.

Forces in physics...pah, stick to your diffraction gratings.

me + class 2 laser = blurry vision for 5 hours :/

come back online on msn so i can send you it

 

[Carlos.]

2nd year of a physics degree, ya cock

 

[Revolt]

next up

guestimate the speed of the bolt moving as it fires a shot

in metres / second



anyone av a stab at that ?

 

[RainbowShooter]

Work out the distance the bolt moves, work out how many cycles it can do a second.

 

[John C]

Remeber the bolt starts from rest and accelerates.
A rough guestimate on forward stroke time is around 8ms.

 

[Revolt]

well if you say it can do 20bps then thats like 0.05 seconds (5ms) for a full stroke

why does that sound so wrong ? ;s

i worked out the bolt travelling at around 8.5 metre / second

anyone want to shoot me down/confirm its about right ?

and the acceleration of the bolt is *Very roughly*

4300 m/s^2

heh... surely not ?

 

[Bedlam]

well if you say it can do 20bps then thats like 0.05 seconds (5ms) for a full stroke

why does that sound so wrong ? ;s

Actually, I don't think that sounds so wrong.

5ms with a bolt stroke distance of what......20-40mm at most....thats not fast in the world of speed....I think that barely registers 1mile an hour.....but the acceleration.....hmmm that would be fairly large....about 16m/s/s based on my calcs.

So I think that sounds about right......feel free to correct me, I'm no physics major, but I am bored and at work


D'oh....you've done your maths.....how did you reach your figures?

 

[Revolt]

urm something along the lines of

it travels roughly 4.3cm in 5 ms

so thats roughly 2cm in 2.5 ms

hence the speed is roughly 8.6m/s (i converted cm > m and ms > s)

so if it travels roughly 2cm at an average speed of 8.6m/s starting from rest i used a = v-u/t which is (8.6m/s)/(0.025s)


altho now i get an acceleration of 344m/s/s

urmmmmmm :S confused !