Vf = ?
y = ?
ME = mgy + 1/2mv^2
ME = 56*9.81*y + 1/2*56*1^2
Ui + Ki = Ui + Ki
gyi + 1/2vi^2 = gyf + 1/2 vf^2gyf = 1/2vf^2
vf = 5.425 m/s
9.81y + 1/2*1^2 = 9.81*1.5 + 1/2*5.425^2
y = 2.949 m
MEi = 56*9.81*2.949 + 1/2*56*1^2
MEi = 1648 J
The picture for this problem really confuses me. I am...
Fp = Fg +Ff
Fp = (21*9.81*sin(31)) + (0.2*21*9.81)
Fp = 147.30
Fp*d = 147.3 *4.5
Wp = Wm = 662.87 = 663 J
I am not sure what I am doing wrong. Should I subtract the force of friction from the force of gravity? Have I assumed that the pulling force is equal to the sum of gravity and friction...