1-A person holds sphere of weight 60 N in his hand while the forearm is horizontal. The biceps muscle is attached4 cm from the joint and the sphere is 30 cm from the joint. What is the upward force exerted by the biceps on theforearm? (neglect the weight of the arm)2-Two children of weight w1 = 200 N and w2 = 300 N are balanced on a board pivoted about its center. If thedistance from the pivot for the first child is r1 = 3 m. what is the distance r2 for the other child from the pivot ?Use the editor to format your answer

Part (1): Given: The magnitude of the wight is 60 N. The distance of the biceps muscle from the…

1-A person holds sphere of weight 60 N in his hand while the forearm is horizontal. The biceps muscle is attached 4 cm from the joint and the sphere is 30 cm from the joint. What is the upward force exerted by the biceps on the forearm? (neglect the weight of the arm)

1-A person holds sphere of weight 60 N in his hand while the forearm is horizontal. The biceps muscle is attached 4 cm from the joint and the sphere is 30 cm from the joint. What is the upward force exerted by the biceps on the forearm? (neglect the weight of the arm)

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Chapter1: Units, Trigonometry. And Vectors

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Rotational Equilibrium And Rotational Dynamics

In physics, the state of balance between the forces and the dynamics of motion is called the equilibrium state. The balance between various forces acting on a system in a rotational motion is called rotational equilibrium or rotational dynamics.

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Question

1-A person holds sphere of weight 60 N in his hand while the forearm is horizontal. The biceps muscle is attached
4 cm from the joint and the sphere is 30 cm from the joint. What is the upward force exerted by the biceps on the
forearm? (neglect the weight of the arm)
2-Two children of weight w1 = 200 N and w2 = 300 N are balanced on a board pivoted about its center. If the
distance from the pivot for the first child is r1 = 3 m. what is the distance r2 for the other child from the pivot ?
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