College Physics (10th Edition)
10th Edition
ISBN: 9780321902788
Author: Hugh D. Young, Philip W. Adams, Raymond Joseph Chastain
Publisher: PEARSON
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Textbook Question
Chapter 1, Problem 39P
A woman takes her dog Rover for a walk on a leash. To get the little dog moving forward, she pulls on the leash with a force of 20.0 N at an angle of 37° above the horizontal, (a) How much force is tending to pull Rover forward? (b) How much force is tending to lift Rover off the ground?
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The upper leg muscle (quadriceps) exerts a force of 294 N, which is carried by a tendon over the kneecap (the patella) at the angles of 55 ° upward and 75 ° downward. Find the direction and magnitude of the force exerted by the kneecap on the upper leg bone (the femur).
The upper leg muscle (quadriceps) exerts a force of F, = 1240 N, which is carried by a tendon over the kneecap (the patella) at the angles shown in the figure below.
Fo
55°
75
F.
Find the magnitude in newtons and direction in degrees counter-clockwise from an axis directed to the left of the force exerted by the kneecap on the upper leg bone (the femur).
magnitude
direction
° counter-clockwise from an axis directed to the left
In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the picture.
The tire remains stationary in spite of the three pulls. Alex pulls with force FAof magnitude 203 N, and Charles pulls with force
F cof magnitude 188 N. Note that the direction of F c is not given. What is the magnitude of Betty's force F 3 if Charles pulls
in (a) the direction drawn in the picture or (b) the other possible direction for equilibrium?
Alex
Charles
136°
Betty
Chapter 1 Solutions
College Physics (10th Edition)
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