When an acrobat walks on a tightrope, she extends her arms straight out from her sides. She does this to make it easier for her to catch herself if she should tip to one side or the other. Explain how this works.
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When an acrobat walks on a tightrope, she extends her arms
straight out from her sides. She does this to make it easier for her to
catch herself if she should tip to one side or the other. Explain how this
works.
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- 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 0.062 kg-m? (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 4.5 m/s in 0.14 s, starting from rest. 0.28 m Axis at elbow joint 0.025 m Number i UnitsDetermine the moment of inertia about the x-axis of each of the areas shown in Figure P9–1. (Hey whatsup, Could you please help me with this solution,I appreciate it)How do I solve this question?
- An ice skater has a moment of inertia of 4.5 kgm2 when her arms are outstretched. With her arms outstretched she is spinning 3.8 radians per second. If she pulls her arms in and decreases her moment of inertia to 2.4 kgm2, how fast is she spinning? A: 7.1 radians/second B: 2.8 radians/second C: 17.1 radians/second D: 6.2 radians/second E: 2.0 radians/secondFour identical particles (mass of each = 0.40 kg) are placed at the vertices of a rectangle (2.0 m × 3.0 m) and held in those positions by four light rods which form the sides of the rectangle. What is the moment of inertia of this rigid body about an axis that passes through the mid-points of the longer sides and is parallel to the shorter sides? Group of answer choices 2.7 kg⋅m2 3.6 kg⋅m2 1.6 kg⋅m2 3.1 kg⋅m2 4.1 kg⋅m2During a steady right turn, a person exerts the forces shown on the steering wheel. Note that each force consists of a tangential component and a radially-inward component. Determine the moment exerted about the steering column at O. The moment will be positive if counterclockwise, negative if clockwise. 9.4 N 28 17° 17⁰ Answer: M = 430 mm i 28° 9.4 N B N-m