College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:m
Ө
show all your steps and write your final answers in a sentence.
Please use g = 9.80 for each of these questions to increase precision.
Therefore all answers will have 3 significant digits.
A person needs to move a box of mass 78.9 kg along the side of a hill.
The hill has an incline of 27.4 degrees.
The coefficient of kinetic friction between the box and hill is 0.156.
a) Calculate the magnitude of the normal force acting on the box.
b) Calculate the magnitude of the force of kinetic friction acting on the box.
c) Calculate the downhill component of the force of gravity acting on the box.
d) Calculate the additional force needed to move the box downhill at a constant velocity.
e) Calculate the additional force needed to move the box uphill at a constant velocity.
In both parts d) and e), the additional force will be parallel to the hill.
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