Recent content by Ced

Thank you so much! I got the answer now. You helped me a lot!

Here is an image for better illustration, I only managed to solve for (a) but I'm not sure if I did it right. As for (b) and (c), I have no idea how to do it. My answer for (a): => Ki + Ui + Wext = Kf + Uf => 0+mgh1-LμmgCosΘ = 1/2mv^2 + mgh2 =>1/2v^2 = gh1- gh2 - LμgCosΘ => V = √2g(h1 - h2 -...

Can someone help me with letter (f). Where did the Wt = Kf - ki come from? Is it from the conservation of energy formula K1 + U1 + Wext = K2 + U2. if yes then how did U1 and U2 become 0? I assume U1 is zero because the suitcase is on the ground but for U2 isn't the suitcase on the plane? so...

Hi if I may ask, I quite don't understand letter (f). Where did the Wt = Kf - ki come from? Is it from the conservation of energy formula K1 + U1 + Wext = K2 + U2. if yes then how did U1 and U2 become 0? I assume U1 is zero because the suitcase is on the ground but for U2 isn't the suitcase on...