Complete question:
A casting with a mass of 500 kg rests on a surface with a slope of 20° to the horizontal. The coefficient of friction is 0.25.
Calculate;
(a) the component of the weight of the object perpendicular to the surface
(b) the component of the weight of the object parallel to the surface
Answer:
(a) the component of the weight of the object perpendicular to the surface is 4,604.5 N
(b) the component of the weight of the object parallel to the surface is 1,675.9 N
Explanation:
Given;
mass of the casting, m = 500 kg
angle of inclination of the casting, θ = 20⁰
the coefficient of friction, k = 0.25
(a) the component of the weight of the object perpendicular to the surface;
F⊥ = mgcosθ
F⊥ = 500 x 9.8 x cos20
F⊥ = 4,604.5 N
(b) the component of the weight of the object parallel to the surface
F|| = mgsinθ
F|| = 500 x 9.8 x sin(20)
F|| = 1,675.9 N
Answer:The planning fallacy
Explanation:
The term planning fallacy describes our tendency to underestimate the time it will take us to finish a certain planned future task or project. Eventhough we know that when we had done the same task previously it took us a longest time to complete it.
Samantha delays doing her paper because she believes she can just do it in only two days which is Saturday and Sunday,which is a limited time to complete a paper and submit in time;planning fallacy can be blamed for this which is causing her to underestimate the time it would take her to finish the paper.
Answer:
violence against women and children are common but the media doesn't show it a lot, emerging in the abuse it's a sad thing to see and it's wrong but some people don't care because when it happens to the child, it reflects more on them than anyone even when theyre grown up
