Chapter 8: Problem 85
A 25 -kg child sits on one side of a teeter-totter, at a distance of \(2 \mathrm{~m}\) from the pivot point. A mass \(m\) is placed at a distance \(d\) on the other side of the pivot, in an effort to balance the teeter-totter. Which of the following combinations of mass and distance (A, B, C, or D) balances the teeter-totter? (Assume that the teeter-totter itself pivots at the center and produces zero torque.) $$ \begin{array}{|l|l|l|l|l|} \hline & \text { A } & \text { B } & \text { C } & \text { D } \\ \hline \text { Mass, } \boldsymbol{m} & 10 \mathrm{~kg} & 50 \mathrm{~kg} & 40 \mathrm{~kg} & 20 \mathrm{~kg} \\ \hline \text { Distance, } \boldsymbol{d} & 2 \mathrm{~m} & 1 \mathrm{~m} & 1.5 \mathrm{~m} & 2.5 \mathrm{~m} \\ \hline \end{array} $$
Short Answer
Step by step solution
Key Concepts
These are the key concepts you need to understand to accurately answer the question.