Hi, I try to solve below question but I have a problem, my answer is wrong
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SULE SAHIN
el 27 de Oct. de 2017
Comentada: Walter Roberson
el 19 de Nov. de 2018
Write a function that is called like this: amag = accelerate(F1,F2,m). F1 and F2 are three-element column vectors that represent two forces applied to a single object. The argument m equals the mass of the object in units of kilograms. The three elements of each force equal the x, y, and z components of the force in Newtons. The output variable amag is a scalar that is equal to the magnitude of the object’s acceleration. The function calculates the object’s acceleration vector a by using Newton’s law: F = ma, where F is the sum of F1 and F2. Then it returns the magnitude of a. Hint: we are talking about physical vectors here, so the Pythagorean theorem will come in handy.
My answer is;
function amag = accelerate(F1,F2,m)
F = F1 + F2;
amag = F./m;
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Respuesta aceptada
Birdman
el 27 de Oct. de 2017
Change the line
amag = F./m;
to
amag=sqrt(sum(F.^2))/m;
7 comentarios
Akash Kumar
el 16 de Oct. de 2018
I write it as F=sqrt(F.1.^2+F2.^2); amag=F./m and got wrong answer. Why?
Más respuestas (3)
Isaac DeVaughn
el 6 de Dic. de 2017
I think i understand the your answer basically there's an extra formula for the magnitude of F=squareroot(Fx^2+Fy^2+Fz^2) that is supposed to be implied by that last line. I didn't understand that from the question but thats kinda how magnitude works
1 comentario
Amit Kumar
el 19 de Feb. de 2018
what is wrong with code? this code runs correctly for some values but showing error for F1=[1;0;0], F2=[0;1;0] and m=1 function [ amag ] = accelerate( F1,F2,m ) F=(sqrt(F1.^2)+sqrt(F2.^2)); amag=sum(F/m); end
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Muniba Arshad
el 9 de Jul. de 2018
Editada: Walter Roberson
el 9 de Jul. de 2018
Guys this is the correct solution,
amag = accelerate(F1,F2,m)
F_sum = F1 + F2;
F = sqrt(F_sum(1,1)^2+F_sum(2,1)^2+F_sum(3,1)^2);
amag = F/m;
Explanation: First add the vectors then find the magnitude of resultant vector and apply the formula a=F/m on it.
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