Discussion :: Force Vectors - General Questions (Q.No.1)
|D.Vengadesan said: (Dec 15, 2010)|
|Sir I want explanation for this answer.|
|Jay Aswani said: (Jan 4, 2012)|
|Sir please provide complete solution so that we can take advantage of that.|
|Mr. Right said: (Sep 9, 2013)|
|The answer is actually 7.68.
The diagram is not a right triangle, as it is in 3 dimensions and not on an x,y axis.
Distance between 2 points in 3d:
(x-0)^2 + (0-1)^2 + (2-4)^2.
x^2 + 1 + 4 = 8^2.
x= sqrt59 = 7.68115.
Now if you check that you will see that it is correct, as opposed to the answer that you all tried to simplify and didn't bother to check your work.
|Second Right said: (Jul 26, 2014)|
|I agree with Mr. Right, there are two perpendicular right triangles that you must solve. This is an engineering mechanics question, not a grade 10 trigonometry question. The answer is x=sqrt(59).|
|Riyaz Ibrahim said: (Oct 5, 2015)|
|I am not satisfied, try to solve in simple format.|
|Woxiiii said: (Nov 22, 2015)|
|It's 3D Pythagoras so all you have to do is substitute into the formula a^2+b^2+c^2=d^2.|
|Abdul Khaleqaue said: (Dec 22, 2015)|
|Suppose B point at black wall and A point at white wall. Draw a line perpendicular to white wall. Now apply Pythagoras formula. You will find square root of (8^2-(4-2)^2) = 7.7459.
It will give you hypotenuse of new triangle. Again apply same formula square root of (7.7459^2-1^2) = 7.68.
|Karthi said: (Dec 28, 2015)|
|Sir I cannot understand so please explain.|
|Nicky said: (Feb 17, 2016)|
|Please explain it into details.|
|Susheel said: (Feb 29, 2016)|
|Alex said: (May 2, 2017)|
|Please, can anyone make it clear?|
|Prahlad said: (Oct 3, 2017)|
|Kunal said: (Jan 19, 2019)|
x = 7.68,
Post your comments here:
Email : (optional)
» Your comments will be displayed only after manual approval.