| Blogs > YPang |
|
YPang
United States4024 Posts
It asks me 1. to Determine the velocity of the 0.30 kg puck after the collision. Which i got, the answer is 1.02 m/s However when it asks me to Find the fraction of kinetic energy lost in the collision. so basically i did .5(M1)(V1)^2 subtract .5(m2)(v2)^2.......... it was wrong.. I dunno what to do... I tried doing ((.5(.2m/s)(1.9m/s)^2)) - ((.5)(.3)(1.02)^2)) = .205..... and my answer was wrong... I dunno how to find the kinetic energy lost..    | ||
|
Hittegods
Stockholm4642 Posts
| ||
|
blapsd
England121 Posts
but you forgot to include the kinetic energy of the 0.2kg puck when you did you calculation for the total kinetic energy afterwards. Kinetic energy afterwards = (0.5 x 0.3 x (1.02)^2) + (0.5 x 0.2 x (0.9)^2) so Kinetic Energy lost is Total KE before - Total KE after ill let you do the rest..... Hope i helped | ||
micronesia
United States24802 Posts
The wording for the second part is a bit ambiguous but I think they want you to do... (Ebefore-Eafter)/Ebefore If that doesn't work then just try the difference like you were before | ||
|
YPang
United States4024 Posts
On February 03 2009 11:47 blapsd wrote: You are right the total kinetic energy before the collision = (0.5 x 0.2 x (1.9)^2) but you forgot to include the kinetic energy of the 0.2kg puck when you did you calculation for the total kinetic energy afterwards. Kinetic energy afterwards = (0.5 x 0.3 x (1.02)^2) + (0.5 x 0.2 x (0.9)^2) so Kinetic Energy lost is Total KE before - Total KE after ill let you do the rest..... Hope i helped EDIT: yeah i got 1.37 for speed of 0.3 puck also this worked thanks | ||
|
blapsd
England121 Posts
| ||
|
Hypnosis
United States2061 Posts
| ||
|
ilovehnk
475 Posts
| ||
|
micronesia
United States24802 Posts
On February 03 2009 12:02 Hypnosis wrote: oh HAHA oh ahhhh lol ahahahahah omg stop it hahaha. just wait until you take physics in college . (unless that is college and its some beginner physics :D) What the heck is your point? | ||
|
Jonoman92
United States9110 Posts
| ||
|
imperfect
Canada1652 Posts
| ||
GHOSTCLAW
United States17042 Posts
On February 03 2009 13:15 Jonoman92 wrote: He thinks he's hot stuff cuz he took some fancy mathmatics class. except we know that micronesia is king of kings when it comes to this stuff on tl.net xD | ||
|
g girl
South Africa4 Posts
Now it asked me what the velocity of the truck was after the collision and i got 20.37m/s north The it asked me to calculate the loss in kinetic energy during the collision... the answer i got was wrong...???? | ||
|
g girl
South Africa4 Posts
| ||
|
blapsd
England121 Posts
I didn't round off too accurately so I might be a little out | ||
|
Klockan3
Sweden2866 Posts
On February 03 2009 12:02 Hypnosis wrote: oh HAHA oh ahhhh lol ahahahahah omg stop it hahaha. just wait until you take physics in college . (unless that is college and its some beginner physics :D) Not everyone takes physics in college. | ||
|
Marradron
Netherlands1586 Posts
| ||
|
YPang
United States4024 Posts
| ||
|
micronesia
United States24802 Posts
| ||
|
g girl
South Africa4 Posts
| ||
| ||
StarCraft 2 StarCraft: Brood War Dota 2 League of Legends Super Smash Bros Heroes of the Storm Other Games |
|
Sparkling Tuna Cup
INu's Battles
herO vs Classic
Percival vs Rogue
Shopify Rebellion Sundays
MilkiCow vs TBD
Clem vs TBD
BSL Open Qualifier
BSL Open Qualifier
Replay Cast
Afreeca Starleague
Rush vs Light
WardiTV Weekly
Monday Night Weeklies
Replay Cast
[ Show More ] |
|
|
EPT
