Original post by fuocr
I know the answer but I'm not sure how to get there.
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Whats the question? Find the resultant force?
Original post by pwk123
Whats the question? Find the resultant force
Yeah it is the resultant force and angle.
Step 1 : break each angle down into its horizontal and vertical components
Step 2 : add up the horizontal parts and vertical parts respectively
Step 3: use Pythagoras' theorem to find the magnitude of the resultant force as (New Force)^2 = (Horizontal Sum)^2 + (Vertical Sum)^2
Step 4 : tan theta = (Horizontal Sum)/(Vertical Sum) to find the angle
Step 2 : add up the horizontal parts and vertical parts respectively
Step 3: use Pythagoras' theorem to find the magnitude of the resultant force as (New Force)^2 = (Horizontal Sum)^2 + (Vertical Sum)^2
Step 4 : tan theta = (Horizontal Sum)/(Vertical Sum) to find the angle
Another option is to draw a vector diagram that is to scale (ie measure the angles and lengths you draw, next vector starts when the prev. vector ends) and then draw a line from the start of the first vector to the end of the last vector and measure the angles and lengths then. (I would probably do pwk123's method though)
Original post by user342
Another option is to draw a vector diagram that is to scale (ie measure the angles and lengths you draw, next vector starts when the prev. vector ends) and then draw a line from the start of the first vector to the end of the last vector and measure the angles and lengths then. (I would probably do pwk123's method though)
Good method but you loose accuracy when drawing
Also I don't think Mr Gove had sketch diagrams in mind when toughening up the A Level
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