A person sits in a chair. There is a weight force W acting on them. According to Newton's third law which force is equal in magnitude and opposite in direction to W? a) the normal force of the chair pushing on the person

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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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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These two questions aren't correct. I still don't understand the logic, could you please revise it?

A person sits in a chair. There is a weight force W acting on them. According to Newton's third
law which force is equal in magnitude and opposite in direction to W?
a) the normal force of the chair pushing on the person
b) the normal force of the person pushing on the chair
c the gravitational force of the person pulling on the Earth
d) the static friction force of the ground on the chair

 

An object with mass m slides down a sloped, frictionless ramp. The normal force of the ramp on
the object is
a) less than mg
b) equal to mg
c) greater than mg
d) not enough information

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