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Chapter #17B2 solution

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Step-by-step solution to solving practice problem 17B #2.

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the question was what is the force on a name through the balls I forget which which ones running to do the upper left-hand one that 3 x 10 to the -6 I'm going to have a 4 of Attraction from the three guy to the guy that down below the 2.4 negative I like to think of this guy right here as home plate in the first second third base but we're going to use the labels that they gave us I know that the three guy gets pulled downward as opposed to gets pushed upward Opposites Attract great so I have a force that's going to be pulling me straight that way okay what about bass what's he going to be doing is he going to be pulling the three guy to the right or pushing him to the left Portsmouth right cuz they're opposite charges straight and I'm also course going to have an attractive force over here to the -9 so what I need to do is sleep if I add the red and the green and the blue what does that work out to be that's where we're going so I would like the first of all figure out what the force of a 3 years on the 3DO to the guy right below in the mine is 2.4 the plug and Chuck 9 X 10 to the 9 time's the charge of a guy I'm talking about 3 x 10 to the -6 x to charge the other guys pulling them to 4 x 10 to the -6 and the distance between them is 15 cm but because we're not dorks we convert to meters now you'll notice please that I did not write -2.4 did that on purpose is my 12th year teaching the course and I have found that it is better for students just to keep it all positive take the magnitude and then use the brain that God gave you we just use the brain that we were given to say hi closest downward to find the magnitude and then later figure out which direction to go question I punch my numbers in I got 2.88 for my magnitude and I like to put a little air to remind me with directions going to be downward will need information later what's calculate the next to can't plug in the guy in the right 9 X 10 to the 9 x 5 original charger 3 microcoulomb 26 microcoulombs I realize it's negative but worry about that later and the distance between them is 15 cm 7.2 and we already decided from before that it moves you straight to the let's do the last guy the blue guy the -9 in the bottom right-hand corner okay I have 9 X 10 to the 9 * my two charges / the distance between them Square however I'm rookie move here we found my rookie move wrong on the breast is the diagonal excellent it is not fit centimeters from here to here it's 15 cm squared to right isosceles triangle so let's go ahead and do a little bit of a racing square root of 2 score now what's right 5.4 in the way down to 45 degree angle so let's see what we have up to now we have a 5.4 in a 45 degree angle downward we have a 7.2 straight to the right and we have a 2.88 going straight down look at all these bad boys together on our first 2.88 it did nothing on the right and left he told me 2.88 downward that's why I put the minus sign on there because we adopt the convention that anything is down is negative anything to the left is negative please note there's nothing religiously sacred about that it's just we all kind of agree to adopt that convention we can do the other as long as we all agree to it keep pulling straight to the right we have 7.2 it doesn't do anything down work why is a 7.2 positive not negative over to the right great thank you finally I have with a 5.4 5.4 pointed straight to the right so I have this actually not straight to the right spypoint for this way this is a 45 degree angle show is 5.4 cosine of 85° and 5.4 sine of 45° know some of your getting nervous about splitting this my apologies but you have seen it many times it's chapter number 11 year olds were one is chapter number 9 in your Geometry book there's a reason they called algebra 2 trig and those in pre-calc you're getting it again this is nothing you oh by the way it's also chapter number three in your physics book we done this before so this guy over here is cosine of 45 degrees and this other guy over here is sine of 45 degrees I see it's 5.4 cosine 45 degrees this movie it's for the right the other guys movie a downward Sage of the negative now you add weight works out to beat Loops Trigun this works out to be 6.7 this way negative and this is 11.02 so we're almost done Hugo 11.02 this way Hugo 6.70 this way now use the dead Greek dude 2 Chainz eBay

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Chapter #17B2 solution

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