Joule (J) is the metric unit for energy
Explanation:
F net = 2+6-4 ( 2 and 6 N are in same direction so they get added, 4N in opposite direction so it will be subtracted)
F net=4 N
Answer:
Explanation:
Given
Weight of strut 
Weight of sign Board 
In this question angle which cable makes with horizontal is not given so
assuming 
From Diagram
Moment about hinge point




in x direction is zero


in Y direction is zero therefore




B. Circulatory, respiratory, nervous
You could do something about Einstein's theory of energy... it seems like it would be a simple and easy project. E=mc^2