Register to reply 
Meteorite falling on a Car... 
Share this thread: 
#1
Feb1907, 08:51 PM

P: 42

1. The problem statement, all variables and given/known data
A 27 pound meteorite fell and struck a car, creating a dent about 28 cm deep. If the initial speed of the meteorite was 530 m/s, what was the magnitude of the average force exerted on the meteorite by the car? 2. Relevant equations Vf^2=Vi^2+2ad F=ma 3. The attempt at a solution Just need someone to tell me if my work is right. I found the acceleration using Vf^2=Vi^2+2ad it came out to be501,607 m/s^2 I to the mass of the meteorite 27/2.2= 12.273 kg and multiplied it my the acceleration and came up with 6.156 MN. Did I do this problem right? 


#2
Feb1907, 09:55 PM

Sci Advisor
HW Helper
PF Gold
P: 6,036




#3
Feb1907, 11:08 PM

P: 42

Isn't the force equal but opposite? 


#4
Feb1907, 11:25 PM

Sci Advisor
HW Helper
P: 2,887

Meteorite falling on a Car...
Patrick 


#5
Feb2007, 04:21 AM

Engineering
Sci Advisor
HW Helper
Thanks
P: 6,953

I suppose PhantomJay is referring to other forces on the meteorite such as its own weight.
Its weight of 12.273*9.8 N = 0.00012 MN is negligible compared to the force caused by the impact, so it is reasonable to ignore it. The question doesn't say what direction the meteorite was travelling, and if you have ever seen a "shooting star", there is no reason to assume it would be falling vertically downwards. So even if you did want to include the weight, you don't know how to add the two force vectors. 


#6
Feb2007, 09:41 AM

Sci Advisor
HW Helper
PF Gold
P: 6,036




#7
Feb2007, 06:40 PM

Engineering
Sci Advisor
HW Helper
Thanks
P: 6,953

(I've worked on what happens when parts of jet engines break, and I know how much damage a 20 lb object travelling at "only" 200 m/sec can do, because I've seen the results of the experiment). 


Register to reply 
Related Discussions  
Meteorite dating question  Biology, Chemistry & Other Homework  2  
Meteorite Collision Modelling  Astronomy & Astrophysics  2  
Meteorite heading towards earth  Introductory Physics Homework  4  
Meteorite wrecks houses in India: BBC  Astronomy & Astrophysics  0  
Midwesterners take a meteorite shower  Astronomy & Astrophysics  4 