<span>It's more accurate than scale diagrams.
You don't need tools (graph paper, protractor etc)
Also, if you are using computers, it easy to programmme.</span><span>
</span>
A :-) it was given the name Newton (N). from this, the derived unit of energy (or work) is defined ,as the work produced when the unit of force causes a displacement equal to the unit of length of its point of application along its direction . It was given the name Joule (J).
Answer:570.54 N
Explanation:
Given
mass of man=76 kg
![\theta =50^{\circ}](https://tex.z-dn.net/?f=%5Ctheta%20%3D50%5E%7B%5Ccirc%7D)
As man is standing over inclined building therefore
its weight has two components i.e. sin and cos component
Force perpendicular to inclined wall
![F=mgcos\theta =76\times 9.8\times \sin 50](https://tex.z-dn.net/?f=F%3Dmgcos%5Ctheta%20%3D76%5Ctimes%209.8%5Ctimes%20%5Csin%2050)
F=570.54 N
Based on this, you can tell that Iron(Fe) does not react with Nitrogen(N), but does with something in normal air. The element the Iron is reacting with Oxygen(O), and the compound that is formed is called iron oxide.