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Q URI PSY 232 Exam 1 Flashcarx erm URIT × adaptivewileyplus.com/secure/lsStudent Dashboard#/eTextBook use N Netflix Google Drive @ Sakai@URI T Top Hat P Master Q psych 232 midterm uri Flashc × D wileyPH College Physics 1e LS PHY111 Fall 2 Hw 9 Abo Hw-9 (10 of 10) Time Spent 00:00:12 Q10: St A door is made of a 20.6-kg uniform board that measures 2.65 m high and 0.916 m wide. The door is free to rotate about its hinges. A force of magnitude 3.72 N is applied to the door (a) What is the magnitude of the maximum torque that can be generated about the door's hinges? N m (b) With the torque calculated in part (a), what is the magnitude of the angular acceleration of the door? rad/s (c) Assuming that the torque calculated in part (a) is constant, what is the rotational power being supplied to the door after 1.2 s? Assume the door starts from rest. [A Hint : Mark for Review Confidence | mit Answer Finish Assignment

Explanation / Answer

a) for the maximum torque

maximum torque = 0.926 * 3.72

maximum torque = 3.44 N.m

b)

moment of inertia , I = 1/3 * m * L^2

I = 1/3 * 20.6 * 0.916^2

I = 5.76 Kg.m^2

let the angular acceleration is a

a * 5.76 = 3.44

a = 0.60 rad/s^2

the angular acceleration is 0.60 rad/s^2

c)

at t = 1.2 s

angular velocity = 1.2 * 0.6

angular velocity = 0.716 rad/s

power delivered = Torque * w

power delivered = 0.716 * 3.44

power delivered = 2.46 W

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