FIGURE 12-7
-Assuming the lower arm has a mass of 2.8 kg and its CG is 12 cm from the elbow-joint pivot, how much force must the extensor muscle in the upper arm exert on the lower arm to hold a 7.5 kg shot put (Fig. 12-7)?
A)100 N
B)500 N
C)750 N
D)1000 N
E)1500 N

Question

FIGURE 12-7 
-Assuming the lower arm has a mass of 2.8 kg and its CG is 12 cm from the elbow-joint pivot, how much force must the extensor muscle in the upper arm exert on the lower arm to hold a 7.5 kg shot put (Fig. 12-7)?
A)100 N 
B)500 N 
C)750 N 
D)1000 N 
E)1500 N

Quizplus · Accepted Answer

The Answer of FIGURE 12-7 
-Assuming the lower arm has a mass of 2.8 kg and its CG is 12 cm from the elbow-joint pivot, how much force must the extensor muscle in the upper arm exert on the lower arm to hold a 7.5 kg shot put (Fig. 12-7)?
A)100 N 
B)500 N 
C)750 N 
D)1000 N 
E)1500 N

FIGURE 12-7 -Assuming the Lower Arm Has a Mass of 2.8 Kg