Multiple-Concept Example 10 reviews the approach and some of the concepts that are pertinent to this problem. The figure shows a model for the motion of the human forearm in throwing a dart. Because of the force M applied by the triceps muscle, the forearm can rotate about an axis at the elbow joint. Assume that the forearm has the dimensions shown in the figure and a moment of inertia of 0.061 kg.m2 (including the effect of the dart) relative to the axis at the elbow. Assume also that the force M acts perpendicular to the forearm. Ignoring the effect of gravity and any frictional forces, determine the magnitude of the force M needed to give the dart a tangential speed of 5.9 m/s in 0.13 s, starting from rest. 0.28 m Axis at elbow joint 0.025 m M4 - ---- Number UnitsMultipleConcept Example 8 reviews the approach that is used in problems such as this. A person eats a dessert that contains 240 Calories. (This "Calorie" unit. with a capital C. is the one used by nutritionists: 1 Calorie = 4186 J. See Section 1217.] The skin temperature of the person is 36 C and that of her environment is 16 L'C. The emissivity of her skin is 0.67 and its surface area is 1.2 m2. How many hours would it take her to emit a net radiant energy from her body that is equal to the energy contained in this dessert? Heat from environment Heal from / JG person .1 \\ Number n Units v