Recent content by Physlithium

Another question, Ff = Fa does not apply on every question EXCEPT when Fa - Ff = 0 am I correct to say that?

Hmm, so to find out Ff is this below way done correctly? Since F = ma = 0, and F = Fa - Ff, I'm suppose to find out what's Ff. So Ff = Fa - F? And since F = 0, it'll be Ff = Fa(50) - 0? So Ff = 50 - 0 = 50 thus Ff = 50?

Thank you so much for your answers, you just saved me. @ Doc Al, since the equation is incorrect, is it possible for you to work out the sum to find the actual answers or you need more details on the question? EDIT: I'm sorry, mistook the equal for a minus. So is the equation correct now?

Hi, Why is F = ma equals to F =mg? Also what is F = Fa - Ff? It came from this question. The question is c) If the box moves at a constant speed of 2m/s-1 when a 50N force is applied, what is the frictional force? (Box is 10kg) Answer: Constant speed => a = 0 F = ma = 0 F = Fa - Ff (what's...

Well, I haven't really understand what's Velocity. It's like displacement is taking a shortcut, but what's velocity? What's initial velocity and the final velocity?