<span>Yes, it's possible to hoist the child up.
Let's first determine the maximum amount of pull that the woman can exert. That will be the simple product of her weight and the coefficient of static friction with her shoes and the ground. So
0.8 * 190 = 152.
So far, so good, since 152 is greater than the boy's 80 lbs. But the cable rubs at the cliff edge and that means that the lady has to pull harder. Let's see how much harder.
There will be 80 lbs of tension on the cable, pressing against the cliff edge. So let's multiply by the coefficient of friction to get how much that is
0.2 * 80 = 16
So friction will take 16 lbs of effort to overcome. So the lady needs to pull with 80 + 16 = 96 lbs of force to move the boy. And since we've determined earlier that she can pull with up to 152 lbs of force, she can easily hoist the child up.</span>
First, draw a diagram (unless it is provided).
Then draw an FBD (free-body diagram for the beam)
Consider the conditions of equilibrium ( ∑ F = 0, ∑ M = 0 ).
Solve for unknowns.
Assuming the wall support is hinged (else insufficient information to solve).
We denote the beam ABC of length 2L, with a weight of 981 N acting at its CG at B.
The cable is attached at C at 45 degrees with the horizontal, with a tension of T newtons.
Sum vertical forces: we cannot sum vertical forces without knowing the vertical reaction at the wall support A.
Next, take moments about A (counter-clockwise positive)
T*(2Lsin(45)-981L=0
solve for T
T=981L/(2Lsin(45)=981/sqrt(2)=693.7 N
Resistance is the ratio of the potential difference between
two points and the electric current flowing between the same
two points. The unit of resistance is the "Ohm".
1 Ohm = 1 volt/ampere.
The term that does belongs to a different group is Patella
Femoral, pelvic and axillary are veins in the body; The patellar is a tendon attaches the bottom of the kneecap (patella) to the top of the shinbone(tibia). It is a ligament that connects to two different bones, the patella and tibia. Patella bone is attached to the quadriceps muscles by the quadriceps tendon.