Finding The Final Velocity

  • Thread starter murphy1935
  • Start date
  • #1

Homework Statement



A 20kg object is on a 10 m long, 15 degree slope , that has a coefficient of friction that is 0.2 Calculate the time to slide down the final velocity at the bottom

2. Homework Equations [/b

Fg=mag
Fn=Fgcos(theta)
Fp=Fgsin(theta)
mu=Ff/Fn
Fr=MAr

The Attempt at a Solution



I have gotten to the Fr=MAr stage, but after that where you substitute for Vf, Vi, S, Ar, and T; I have gotten stuck.

Any hints or tips would be greatly appreciated, thanks for your time
 

Answers and Replies

  • #2
rock.freak667
Homework Helper
6,230
31
Find the resultant acceleration.
Find the final velocity with conservation of energy.
Use v=u+at and find t.
 

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