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HELP HOME PAGE Make a Practice Test Some Hints & Solutions Introductory Topics Kinematics Mechanics Thermodynamics Optics Electric Fields Magnetic Fields Electric Circuits Vibrations and Waves Newton's Third Law A box sits on a ramp inclined at 33.1o to horizontal. If the normal force on the box from the ramp is 42.69 N, what is the mass of the box? kg Get Another Newton's Third Law Question Hints: How to solve this type of problem Try a Minitest: 6 problems of this type NOTE: While these problems are made by a former University Physics professor and are seen thousands of times a week, it is possible that there are typo's or other errors that nobody has yet reported to be fixed. If you are convinced that there is a problem with the solution to this question please send the details to doug@dctech.com