Question

the magnitude of resultant of three components of a vector is 3 its x component is 2 y component is 1 then its z component will be
a.2
b.1
c.4
d.0​

Answer 1

Answer:

d)0

Explanation:

To find the magnitude of a vector..

we always take the root of the sum of the components ...

so here

magnitude=root((x component)^2 +(y component)^2+ (z component)^2)

here which is:

3= root(2^2 +1^2 +z^2)

this gives

3= 3 + root(z^2)

therefore z is 0

Answer 2

Answer:

(a) 2

Explanation: