Calculating final Velocity

by KatieLynn
Tags: final, velocity
KatieLynn is offline
Nov14-07, 08:08 PM
P: 67
1. The problem statement, all variables and given/known data

Find the final velocity of the object if it is initially moving along the x axis with average velocity of -62 m/s.

Other information
average force = 0.8N

2. Relevant equations


3. The attempt at a solution

I use the equation like this


=-61.13m/s Is that right?
Phys.Org News Partner Science news on
SensaBubble: It's a bubble, but not as we know it (w/ video)
The hemihelix: Scientists discover a new shape using rubber bands (w/ video)
Microbes provide insights into evolution of human language
dvdqnoc is offline
Nov14-07, 08:42 PM
P: 23
I dont know why they gave you impulse, you can solve the problem with this equation:

Vf = Vi + at

where Vf=final velocity, Vi=initial velocity, a=acc. and t=time.

Remember - the acc. is .8/.462 because F=ma, so a=F/m.

Good luck!
KatieLynn is offline
Nov14-07, 08:47 PM
P: 67
Vf = Vi + at

Vf= (-62m.s) + (.8/.462)(5)

= -53.3 m/s

Thats what I got but it isn't right. I'm sure I didn't up the algebra, did I plug something in wrong?

dvdqnoc is offline
Nov14-07, 08:50 PM
P: 23

Calculating final Velocity

well then i guess your initial approach is correct. the equation I gave might not work cuz i didnt read the part that said "avg velocity". I think your -61 is correct

Register to reply

Related Discussions
Calculating Final Velocity Introductory Physics Homework 3
Calculating the final velocity of a compressed-air launched projectile Introductory Physics Homework 4
Calculating Final Temp of a mixture Biology, Chemistry & Other Homework 1
Final Velocity Introductory Physics Homework 7
Final velocity Advanced Physics Homework 5