Physics Laboratory Experiments

Jerry D. Wilson, Cecilia A. Hernandez-Hall

Chapter 14 (GL) Torques, Equilibrium, and Center of Gravity - all with Video Answers

Educators

Chapter Questions

Problem 1

Was the center of gravity of the meterstick exactly at the $50-\mathrm{cm}$ mark? If not, why? Explain how the condition $\Sigma \overrightarrow{\mathbf{F}}_{i}=0$ is satisfied for the meterstick in part $\mathrm{A}$ of the experiment.

Donald Albin

Numerade Educator

02:08

Problem 2

Why are clockwise and counterclockwise referred to as "senses," rather than directions?

Prabhu Ramji

Numerade Educator

00:50

Problem 3

Suppose in a situation like Case 2 (a) in the experiment, $m_{1}=200 \mathrm{~g}$ were at the $20-\mathrm{cm}$ position and $m_{2}=100 \mathrm{~g}$ at the $65-\mathrm{cm}$ position. Would there be a problem in experimentally balancing the system with $m_{3}=50 \mathrm{~g}$ ? Explain. If so, how might the problem be resolved?

Zulfiqar Ali

Numerade Educator

02:13

Problem 4

Describe the effects of taking the mass of the meterstick into account when the balancing position is not near the $50-\mathrm{cm}$ position.

Prabhu Ramji

Numerade Educator

05:19

Problem 5

(Optional) A uniform meterstick is in static rotational equilibrium when a mass of $220 \mathrm{~g}$ is suspended from the $5.0-\mathrm{cm}$ mark, a mass of $120 \mathrm{~g}$ is suspended from the $90-\mathrm{cm}$ mark, and the support stand is placed at the $40-\mathrm{cm}$ mark. What is the mass of the meterstick?

Donald Albin

Numerade Educator