# A fly on a windshield

1. Oct 15, 2012

### omc1

1. The problem statement, all variables and given/known dataA stationary 0.195 gram fly encounters the windshield of a 1375 kg automobile traveling at 116 km/h, and sticks to it. What is the change in speed of the car due to the fly

2. Relevant equations V(1f)=(m1-m2/m1+m2)V(1i)+ (2m2/m1+m2)V(2i)

3. The attempt at a solution 1374.99/1375.00=(.9999x116) +0=115.998 116-115.98=0.00116 but its telling me thats wrong....

2. Oct 15, 2012

### lendav_rott

<< solution deleted by Moderators >>

Last edited by a moderator: Oct 15, 2012
3. Oct 15, 2012

### omc1

i kinda see what you're doing and it seems similar to what i was doing but i dont see where u got some of your numbers

Last edited by a moderator: Oct 15, 2012
4. Oct 15, 2012

### Staff: Mentor

Please do not do students' homework for them here on the PF. Please instead provide hints, ask questions, find errors in their work, etc. That's made pretty clear in the Rules link at the top of the page.