In Fig. 8.37, what is the force Fm supplied by the deltoid muscle so as to hold up the outstretched arm if the mass of the arm is 3.0 kg? (Fj is the joint force on the bone of the upper arm—the humerus.)
Answer to relevant QuestionsIn Figure 8.4b, determine the force exerted by the bicep muscle, assuming that the hand is holding a ball with a mass of 5.00 kg. Assume that the mass of the forearm is 8.50 kg with its center of mass located 20.0 cm away ...An artist wishes to construct a birds and bees mobile, as shown in Fig. 8.40. If the mass of the bee on the lower left is 0.10 kg and each vertical support string has a length of 30 cm, what are the masses of the other birds ...If the cord attached to the vertical wall in Fig. 8.44 were horizontal (instead of at a angle), what would the tensions in the cords be? Two objects of different masses are joined by a light rod. (a) Is the moment of inertia about the center of mass the minimum or the maximum? Why? (b) If the two masses are 3.0 kg and 5.0 kg and the length of the rod is 2.0 ...A ball of radius R and mass Mrolls down an incline of angle . (a) For the ball to roll without slipping, should the tangent of the maximum angle of incline be equal to (1) 3 μs/2, (2) 5 μs/2, (3) 7 μs/2, or (4) 9 μs/2? ...
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