Momentum eww

1. Feb 3, 2010

sweetpea1993

Momentum!!! eww

A) what is the momentum of an 8-kg bowling bowl rolling at 2- m/s?
I got this answer which in p=16 kg times m/s

B)If the bowling bowl rolls into a pillow and stops in 0.5 sec, calculate the average force it exerts in the pillow?

C)What is the average force that the pillow exerts on the ball?

please hwlp i have no idea!!

2. Feb 3, 2010

rock.freak667

Re: Momentum!!! eww

Do you know Newton's 2nd law?

F=(mv-mu)/t

3. Feb 3, 2010

tiny-tim

Welcome to PF!

Hi sweetpea1993! Welcome to PF!

Force = rate of change of momentum.

4. Feb 3, 2010

sweetpea1993

Re: Momentum!!! eww

hey,
yes I know this but I'm not for sure how to put the numbers into the equation..
nice names lol :)

5. Feb 3, 2010

tiny-tim

??

rate of change of momentum = change of momentum divided by time.

6. Feb 3, 2010

sweetpea1993

Re: Momentum!!! eww

yeah... okay so (8kg times 2m/s)- whats u stand for??

7. Feb 3, 2010

sweetpea1993

Re: Momentum!!! eww

HEY!!! I figured it out... you take the 16 which converts into newtons times sec times 0.5 which gives you 8 newtons!!

8. Feb 4, 2010

tiny-tim

(just got up :zzz: …)

No, force = change of momentum divided by time.