1. A see-saw is made from a 3.0-m long, 5.0−kg board that is supported in the middle on a pivot. Natalie (m=18 kg) sits

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1 A See Saw Is Made From A 3 0 M Long 5 0 Kg Board That Is Supported In The Middle On A Pivot Natalie M 18 Kg Sits 1 (47.91 KiB) Viewed 83 times

1. A see-saw is made from a 3.0-m long, 5.0−kg board that is supported in the middle on a pivot. Natalie (m=18 kg) sits on one end of the see-saw. Where should her brother Alexander (m=27 kg) sit in order to balance the see-saw? (1.0 m from the center pivot point) 2. The drawing shows an outstretched arm (0.61 m in length). The arm is pulling downward against the ring attached to the pulley system, in order to hold the 98−N weight stationary. To pull the arm downward, the latissimus dorsi muscle applies the force M, at a point that is 0.069 m from the shoulder joint and oriented at an angle of 29 degrees. The arm has a weight of 47 N and a center of gravity (cg) that is located 0.28 m from the shoulder joint. What is the force M ? (M=1392 N)