Question

A 1500 kg car traveling at a speed of 10 m/sskids to a halt on wet...

A 1500 kg car traveling at a speed of 10 m/sskids to a halt on wet concrete where μk = 0.60.

How long are the skid marks?

Express your answer using two significant figures.

L=...

0 0
Add a comment Improve this question Transcribed image text
Answer #1

initial velocity vi = 10 m/s

final velocity vf = 0


initial kinetic energy ki = (1/2)*m*vi^2

final kinetic energy Kf = (1/2)*m*vf^2

frictional force fk = uk*m*g


work done by frictional force Wf = f*L*cos180 = -uk*m*g*L

from work energy theorem


work = change in kinetic energy

-uk*m*g*L = (1/2)*m*(vf^2-vi^2)

-0.6*9.8*L = (1/2)*(0-10^2)

distance L = 8.5 m <<<<<------ANSWER

Add a comment
Know the answer?
Add Answer to:
A 1500 kg car traveling at a speed of 10 m/sskids to a halt on wet...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT