00:01
In this problem, we are given that the force f1 is the vector negative 8, negative 5, the force f2 is the vector 7 -7, and the force f3 is the vector 02, and that these three forces are acting on an object.
00:22
We are first asked to find the net force, denoted as f -net.
00:26
Now the net force acting on the body is the sum of these three forces, that is f1 plus f2 plus f3.
00:35
And this is the vector formed by the addition of these three vectors together.
00:43
That is the sum of the vector negative 8, negative 5, 7, and 02.
00:52
Now, a vector that is formed by adding different vectors together is having components obtained by adding the corresponding components of the vectors together.
01:06
So the first component of the net vector will be negative 8 plus 7 plus 0 which are or which is the sum of the first components of these three vectors that have been added.
01:19
And the second component will be negative 5 plus 7 plus 2 which is the sum of the second component of each of these vectors being added therefore the net force acting on the body will be negative 1 4 upon simplification therefore the net force acting on the object is the vector negative 1 4 the second question is to find the force f4 that must be added to the vectors f1, f2 and f3 so that the net force is 0...