[問題] 3題普物 (500p幣)
小弟有三題普物想請教
希望能有強者解答，要有計算過程和解釋
1.A uniform thin wire is bent into a semicircle of radius r. Determine
the coordinates of its center of mass with recpect to an origin of coordinates
at the center of the ''full'' circle.
2.A centrifuge rotor is accelerated from rest to 2000 rpm in 30s.
(a) What is its average angular acceleration? (b) Through how many
revolutions has the centrifuge rotor turned during its acceleration period,
assuming constant angular acceleration?
3.A bullet of a mass m moving with velocity v strikes and becomes
embedded at the edge of a cylinder of mass M and radius R0. The cylinder,
initially at rest ,begins to rotate about its symmetry axis,which remains
fixed in position.Assuming no frictional torque,what is the angular velocity
of the cylinder after this collision?What is the change in kinetic energy?
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謝謝回答
微薄P幣以表心意
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01/14 18:31, , 1F
01/14 18:31, 1F
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