A 0.50-kg ball that is tied to the end of a 1.5-m light cord is revolved in a horizontal plane, with the cord making a 30 angle with the vertical. (See Fig. P7.74.) (a) Determine the balls speed. (b) If, instead, the ball is revolved so that its speed is 4.0 m/s, what angle does the cord make with the vertical? (c) If the cord can withstand a maximum tension of 9.8 N, what is the highest speed at which the ball can move?
Lecture objectives 13 1. What are the functional groups of muscles Head, facial, neck, shoulder arm, forearm, thorax, abdomen, pelvis, thigh, leg 2. How organization and attachments of muscles dictate movement Agonist (primary mover) - muscle that has the major responsibility for producing a specific movement Antagonist - muscle that oppose or reverse a specific movement Synergist - assist prime mover by adding extra force or reduction unnecessary movement Fixator - kind of synergist that hold bone in place Origin - attachment at fix or immovable bone Insertion - attachment on the moveable bone Fascicle arrangement Circular Convergent Parallel Fusiform Pennate - Uni- Bi- Multi- Upper limb - A muscle that crosses the anterior side of a joint pro