2. Barry carries his tray of food to his favorite cafeteria table for lunch. The 0.50 m long tray has a mass of 0.20 kg and holds a 0.40 kg plate of food 0.20 m from the right edge. Barry holds the tray by the left edge with one hand, using his thumb as the fulcrum, and pushes up 0.10 m from the fulcrum with his finger tips. a. How much upward force must his finger tips exert to keep the tray level? b. How might Barry make the tray easier to carry if he chooses to use only one hand?
2. Barry carries his tray of food to his favorite cafeteria table for lunch. The 0.50 m long tray has a mass of 0.20 kg and holds a 0.40 kg plate of food 0.20 m from the right edge. Barry holds the tray by the left edge with one hand, using his thumb as the fulcrum, and pushes up 0.10 m from the fulcrum with his finger tips. a. How much upward force must his finger tips exert to keep the tray level? b. How might Barry make the tray easier to carry if he chooses to use only one hand?
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter8: Rotational Equilibrium And Dynamics
Section: Chapter Questions
Problem 35P
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2. Barry carries his tray of food to his favorite cafeteria table for lunch. The 0.50 m long tray
has a mass of 0.20 kg and holds a 0.40 kg plate of food 0.20 m from the right edge.
Barry holds the tray by the left edge with one hand, using his thumb as the fulcrum, and
pushes up 0.10 m from the fulcrum with his finger tips.
a. How much upward force must his finger tips exert to keep the tray level?
b. How might Barry make the tray easier to carry if he chooses to use only one hand?
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