Space Time & Motion A.4 Rotational Mechanics (id: 65df7a55f)

本题目来源于试卷: Space Time & Motion A.4 Rotational Mechanics，类别为 IB物理学

[单选题]
A disc of mass m and radius r rolls 3u3(k jtmxni-n mu7w6 wit401*g+ v,os vdmmugm e(6jbsg hout slipping from rest down an inclined planesu*gm 1vm +40smo g ,vbedg6(j.

The moment of inertia of the disc is $frac{1}{2}​mr^2$.
Which of the following is correct about the linear acceleration of the disc and the net torque?

A. Linear Acceleration is $\frac{2}{3}$gsinθ ; Net Torque is $F_f​r$
B. Linear Acceleration is $\frac{2}{3}$gsinθ ; Net Torque is $mgsinθ$
C. Linear Acceleration is $gsinθ$ ; Net Torque is $F_f​r$
D. Linear Acceleration is $gsinθ$ ; Net Torque is $mgsinθ$


参考答案:  A


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