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Please answer both questions 1) A chimney (length 24.2 m, mass 401 kg) cracks at the...

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Physics

Please answer both questions

1) A chimney (length 24.2 m, mass 401 kg) cracks at the base andtopples. Assume: the chimney behaves likea thin rod, and does not break apart as it falls, only gravity (nofriction) acts on the chimney as it falls, the bottom of thechimney pivots, but does not move.
Find the linear speed of the center of mass of the chimney, in m/s,just as it hits the ground

2)A chimney (length 13 m, mass 922 kg) cracks at the base andtopples. Assume: the chimney behaves likea thin rod, and does not break apart as it falls, only gravity (nofriction) acts on the chimney as it falls, the bottom of thechimney pivots, but does not move.
Find the linear speed of the very top of the chimney, in m/s, justas it hits the ground.  

Answer & Explanation Solved by verified expert
3.7 Ratings (409 Votes)
1Gravitational potential energy of an extended body is given bymgh where m is mass g is gravitational acceleration h is heightof center of mass of the extended bodyFor a uniform rod center of mass is at the midpoint Soassuming length of rod to be L gravitational potentialenergymgL2Also kinetic energy of a rotating object is given by12I2where    See Answer
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