2. How much tension (Fm) must be supplied by the triceps at the elbow joint to stabilize the arm against an external force (Fe) of 200 N given dm

Complete Question

How much tension (Fm) must be supplied by the triceps at the elbow joint to stabilize the arm against an external force (Fe) of 200 N given and  

The force is

Explanation:

From the question we are told that

   The external force is

    The length from the wrist to the elbow is  

    The length from the triceps to the elbow is

at equilibrium

Taking moment about the elbow

=>    

=>    

=>    

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards