AP® Physics 1 & 2

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Rotational Motion of a Mass


A device provides a steady $15.0\text{ Newton}$ force to a $100\text{ g}$ mass on the end of a $75.0\text{ cm}$ rod that can be considered massless. The pivot point is the left side of the rod. The device spins for one minute.

Created for Albert.io. Copyright 2016. All rights reserved.

Which of the following statements are most consistent with the data?

Choose TWO answers.


The final angular velocity of the $100\text{-gram}$ mass after one minute is $12{,}000\text{ rad/s} $.


The torque acting on the $100\text{-gram}$ mass is $1125\ \mathrm{ m\cdot N}$.


The change in angular momentum of the $100\text{-gram}$ mass after one minute is $900\ \mathrm{ kgm^2/s}$.


The tangential acceleration of the $100\text{-gram}$ mass is $150\text{ m/s}^{ 2 }$.