Ex. 20: The moment of inertia of body about an axis of rotation is 150 kg m2. Calculate the angular acceleration produced in it when a torque magnitude 300 Nm acts on it.
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- Suppose you're an field engineer inspecting an offshore wind turbine. You're in a boat approaching a the particular turbine you'll be inspecting. Your boat's velocity is a constant 8 knots on a course perpendicular to the turbine's axis of rotation. The turbine blades are 10 m in length and turning with a constant angular velocity of 20 rad/s. What additional information would you need in order to calculate the velocity of a point on the turbine blade tip relative to you? nothing, you have all the information you need turbine angular acceleration position of the blade tip relative to the turbine's rotation center at the time of measurementA figure skater performs a twisting jump. She rotates around her longitudinal axis 2 times in 0.65 s. What was her average angular velocity in radians/second? A 720rad/s B 19.3rad/s C 4? rad/s D 9.67 rad/s E 1107 rad/sSuppose a yo-yo has a center shaft that has a 0.290 cm radius and that its string is being pulled. (a) If the string is stationary and the yo-yo accelerates away from it at a rate of 1.70 m/s?, what is the angular acceleration of the yo-yo in rad/s?? |rad/s² (b) What is the angular velocity in rad/s after 0.750 s if it starts from rest? rad/s (c) The outside radius of the yo-yo is 3.60 cm. What is the tangential acceleration in m/s? of a point on its edge? |m/s²
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