EBK FUNDAMENTALS OF THERMODYNAMICS, ENH
9th Edition
ISBN: 9781119321453
Author: Sonntag
Publisher: JOHN WILEY+SONS,INC.-CONSIGNMENT
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Textbook Question
Chapter 1, Problem 1.26P
One of the people in the previous problem weighs
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An unknown mass and a 12 kg mass are tied to a light string and hung over a frictionless pulley. If the tension in the string is 50 N, what is the unknown mass?
Trina is a gym goer with a leg length of 84 cm. Suppose that she is in the gym doing straight legraising with 10 lb weights.
Compute for the force that the muscle should exert in order to (1) maintain it in the position and(2) lift the weight up given that the distance of the effort (muscle) from the joint is 54 cm,distance of the weight is 80 cm, and the COM is 45 cm from the joint.
ANSWER THE QUESTION:
1.) Assuming that the leg moves at 0. 9 seconds, compute for the angular velocity.
GIVEN:
Leg length = 84 cm = 0.84 m
Distance of the muscle from the joint = 54 cm = 0.54 m
Distance of the weight = 80 cm = 0.80 m
Distance of the COM from the joint = 45 cm = 0.45 m
Mass = 10 lb = 4.535 kg
Linear displacement x = 38.971 cm Or x = 0.389 m
A dentist's chair with a person in it weighs 1950 N. The output plunger of a hydraulic system starts to lift the chair when the dental assistant's foot exerts a force of 44 N on the input piston. Neglecting any difference in the heights of the piston and the plunger, what is the ratio of the area of the plunger to the area of the piston?
Aplunger
Apiston
=
Chapter 1 Solutions
EBK FUNDAMENTALS OF THERMODYNAMICS, ENH
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