On average, both arms and hands together account for 13% of a person's mass, while the head is 7.0% and the trunk and legs account for 80%. We can model a spinning skater with her arms outstretched as a vertical cylinder (head, trunk, and legs) with two solid uniform rods (arms and hands) extended horizontally. Suppose a 71.0 kg skater is 1.60 m tall, has arms that are each 70.0 cm long (including the hands) and a trunk that can be modeled as being 35.0 cm in diameter. The skater is initially spinning at 80.0 rpm with her arms outstretched. What will her angular velocity 2 be (in rpm) after she pulls in her arms and holds them tightly against her trunk? @₂ = гре

The momentum of an object is given by multiplying its mass and velocity. Momentum is a property of any object that moves with mass. The only difference between angular momentum and linear momentum is that angular momentum deals with moving or spinning ob…

The idea of moments is an important concept in physics. It arises from the fact that distance often plays an important part in the interaction of, or in determining the impact of forces on bodies. Moments are often described by their order [first, second…