Time needed for a Force F to accelerate the crate to 2m/s? (Dynamics)

Join the discussion
Registration is free. Start your own thread to ask a follow-up.
Sign up Log in
2 replies · 2K views
bardia sepehrnia
Messages
28
Reaction score
4
Homework Statement
The mass of the crate, coefficient of static and kinetic friction is given. The force equation is also given.
Relevant Equations
F=300t
242317

So above is the question. The picture below is my attempt at the solution:
242318


However the answer at the back of the book suggest that T=1.929s
 
Physics news on Phys.org

Discussion

I agree with the book. What did you do at the very last step? What does v=1.292 mean and how did you get it? You are supposed to find the time when the velocity is 2 m/s up the incline.
 
  • Like
Likes   Reactions: bardia sepehrnia
kuruman said:
I agree with the book. What did you do at the very last step? What does v=1.292 mean and how did you get it? You are supposed to find the time when the velocity is 2 m/s up the incline.
Wow, I've been doing dynamics for too long today and been extremely tired and frustrated. For some reason I equated the entire equation to 0 where as you pointed out, I obviously had to equate it to 2. Thank you very much!