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Question1
A playground merry-go-round of radius R = 1.80 m has a moment of inertia I = 255 kg.m2 and is rotating at 8.0 rev/min about a frictionless vertical axle. Facing the axle, a 26.0 kg child hops onto the merry-go-round and handles to sit down on its edge. What is new angular speed of the merry-go-round?
Question2
To extend a relaxed biceps muscle 2.2 cm requires a force of 25 N. Find out Young's modulus for the muscle tissue, assuming it to be a uniform cylinder of length 0.24 m and cross-sectional area 52 cm2.
Question3
A child exerts a tangential 40.8 {N} force on the rim of a disk-shaped merry-go-round with a radius of 2.30 {m}.If the merry-go-round starts at rest and acquires an angular speed of 0.0830 {rev/s} in 4.50 {s}, what is the mass?
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