looseliver
Apr20-10, 03:33 AM
1. The problem statement, all variables and given/known data
I could really do with some feedback here. I've tried a solution but I'm unsure about the answers i got, especially in the second part.
http://www.mediafire.com/?r0mcmwjylt0
2. Relevant equations
P = µFx = Max ∑MB = ∑Mad
V = U + at
3. The attempt at a solution
Taking X in the horizontal direction and Y in the vertical. µ = Friction factor d = distance vertically to G a= acceleration.
Force P = µFx = Max ∑MB = ∑Mad = 30(9.81)x(0.2)=30a(0.2)
58.86=6a
a=9.81 m/s2
µFx = Max 0.5Fx = 30(9.81) Fx = 590N
V after 5 sec: V = U + at = 0 + (9.81)5 V=49.05 ????? - seems too fast!
I could really do with some feedback here. I've tried a solution but I'm unsure about the answers i got, especially in the second part.
http://www.mediafire.com/?r0mcmwjylt0
2. Relevant equations
P = µFx = Max ∑MB = ∑Mad
V = U + at
3. The attempt at a solution
Taking X in the horizontal direction and Y in the vertical. µ = Friction factor d = distance vertically to G a= acceleration.
Force P = µFx = Max ∑MB = ∑Mad = 30(9.81)x(0.2)=30a(0.2)
58.86=6a
a=9.81 m/s2
µFx = Max 0.5Fx = 30(9.81) Fx = 590N
V after 5 sec: V = U + at = 0 + (9.81)5 V=49.05 ????? - seems too fast!