Question

what displacement must be added to the displacement 25 vector -6vector and to give a displacement of 7.0 m pointing in the X direction

Answer 1

Hey there !

Solution:

Given Vector = 25 i - 6 j

Resultant Vector = 7 m in the direction of x axis.

We know that x axis refers to the direction in terms of i

So the Resultant vector can be written as 7 i

So Original Vector + Some Vector = 7 i

Let the Some vector be denoted by V.

=> 25 i - 6 j + V = 7 i

Transposing the terms other than V to the Left Hand Side we get,

=> V = 7 i - ( 25 i - 6 j )

=> V = 7 i - 25 i + 6 j

=> V = -18 i + 6 j

Hence the unknown vector to be added is -18 i + 6 j.

Hence option (c) is correct.

Hope my answer helped !

Answer 2

Explanation:

hi here your answer ❤