A lunch tray is being held in one hand, as the figure illustrates. The mass of the tray itself is 0.237 kg. and its center of gravity is located at its geometrical center. On the tray is a 1.19-kg plate of food and a 0.241-kg cup of coffee. Obtain (a) the force 7 exerted by the thumb and (b) the force exerted by the four fingers. Both forces act perpendicular to the tray, which is being held parallel to the ground.

A lunch tray is being held in one hand, as the figure illustrates. The mass of the tray itself is 0.237 kg. and its center of gravity is located at its geometrical center. On the tray is a 1.19-kg plate of food and a 0.241-kg cup of coffee. Obtain (a) the force 7 exerted by the thumb and (b) the force exerted by the four fingers. Both forces act perpendicular to the tray, which is being held parallel to the ground.

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter5: Displacement And Force In Two Dimensions

Section: Chapter Questions

Problem 82A

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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

Alunch tray is being held in one hand, as the figure illustrates. The mass of the tray itself is 0.237 kg,
and its center of gravity is located at its geometrical center. On the tray is a 1.19-kg plate of food and
a 0.241-kg cup of coffee. Obtain (a) the force 7 exerted by the thumb and (b) the force exerted by
the four fingers. Both forces act perpendicular to the tray, which is being held parallel to the ground.
0.400 m
0.380 m
0.240 m
0.100 m
0.0600 m
henc
henc

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