What is the sum of the following four vectors in (a) unit-vector notation, and as (b) a magnitude and (c) an angle? Positive angles are counterclockwise from the positive direction of the x axis; negative angles are clockwise. = 4.00 m, at 65.0° = 5.00 m, at -235°

The angle will be "124°". The further explanation is given below.

Explanation:

As we know,

(a)...

Let the resultant of , , and will be , then

⇒  

On putting values, we get

⇒      

⇒      

(b)...

On squaring both sides, we get

⇒  

⇒      

(c)...

Let the resultant angle will be "",

⇒  

⇒  

⇒  

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards