College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter1: Introduction: The Nature Of Science And Physics
Section: Chapter Questions
Problem 23PE: If a marathon runner averages 9.5 mi/h, how long does it take him or her to run a 26.22-mi marathon?
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Concept explainers
Rotational Equilibrium And Rotational Dynamics
In physics, the state of balance between the forces and the dynamics of motion is called the equilibrium state. The balance between various forces acting on a system in a rotational motion is called rotational equilibrium or rotational dynamics.
Equilibrium of Forces
The tension created on one body during push or pull is known as force.
Question
A child of weight 30 kg (m2) walks along a uniform board of weight 10 kg (m1) and length = 10 m. The board is supported by two legs (symmetry to the center) with negligible weight shown in the figure.
How close (i.e. find x) could the child walk to the right end before the board flips (in m)?
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