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View Full Version : Unfamilar which equations to use for this problem and how to solve it?


js261994
Jan 17, 2012, 07:18 PM
A 10 N force acts South and a 70 N force acts due East on a 15 kg object.

Add these two forces graphically and show the resultant force

What is the magnitude of the resultant force?

Calculate the magnitude of the acceleration

Aurora2000
Jan 19, 2012, 10:25 AM
You need to translate "South" and "East" into directions.

Draw a quadrant (up=north, right=east, left=west, down=south) and impose a coordinate system, with positive x axis corresponding to east and positive y axis to north. Under these coordinates you have that
the resultant is a force with x component 70N and y component -10N.

The magnitude is 50\sqrt{2} , and for the acceleration use F=ma .