A solid, uniform disk lies on a horizontal table, free to rotate about a fixed vertical axis through its center while a constant tangential force applied to its edge exerts a torque of magnitude 2.50 ✕ 10−2 N · m for 2.20 s.   (a) Calculate the magnitude of the disk’s change in angular momentum (in kg · m2/s). In the same way that a net force changes an object’s linear momentum, a net torque changes its angular momentum. kg · m2/s (b) Find the change in the disk’s angular speed (in rad/s) if its mass and radius are 0.290 kg and 0.140 m, respectively. rad/s

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A solid, uniform disk lies on a horizontal table, free to rotate about a fixed vertical axis through its center while a constant tangential force applied to its edge exerts a torque of magnitude 2.50 ✕ 10−2 N · m for 2.20 s.
 
(a)
Calculate the magnitude of the disk’s change in angular momentum (in kg · m2/s).
In the same way that a net force changes an object’s linear momentum, a net torque changes its angular momentum.
kg · m2/s
(b)
Find the change in the disk’s angular speed (in rad/s) if its mass and radius are 0.290 kg and 0.140 m, respectively.
rad/s