A student hits a board with an initial speed of 10.0 m/s. The student's hand and the board are in contact for 0.002 second and the speed of the hand decreases to 1.0 m/s during the contact between the board and the hand (the hand is aļways moving forward). The mass of the student's hand and arm is 1.0 kg, and the board has a cross-sectional area A = 10.0 cm². £stimate the shear stress on the board.

A student hits a board with an initial speed of 10.0 m/s. The student's hand and the board are in contact for 0.002 second and the speed of the hand decreases to 1.0 m/s during the contact between the board and the hand (the hand is aļways moving forward). The mass of the student's hand and arm is 1.0 kg, and the board has a cross-sectional area A = 10.0 cm². £stimate the shear stress on the board.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter13: Rotation Ii: A Conservation Approach

Section: Chapter Questions

Problem 64PQ

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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 student hits a board with an initial speed of 10.0 m/s. The student's hand and the board are in contact for 0.002 second and the
speed of the hand decreases to 1.0 m/s during the contact between the board and the hand (the hand is alvays moving forward).
The mass of the student's hand and arm is 1.0 kg, and the board has a cross-sectional area A = 10.0 cm?. Estimate the shear stress
on the board.

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