Answer:
Part a)
the tension force is equal to the weight of the crate
Part b)
tension force is more than the weight of the crate while accelerating upwards
tension force is less than the weight of crate if it is accelerating downwards
Explanation:
Part a)
When large crate is suspended at rest or moving with uniform speed then it is given as
here since speed is constant or it is at rest
so we will have
so the tension force is equal to the weight of the crate
Part b)
Now let say the crate is accelerating upwards
now we can say
so tension force is more than the weight of the crate
Now if the crate is accelerating downwards
so tension force is less than the weight of crate if it is accelerating downwards
The north Celestial pole is 42.036 degrees above the northern horizon when I look at it from my front yard.
I don't need to know my latitude to discover that, since I can measure it directly in the sky.
But when I DO look up my latitude, it blows my mind ! It's the exact same number ... 42.036 degrees north ! This can't be just a coincidence. There must be some connection !
(YOU can't use this number. It's different where you live.)
Lets take a small element of rod on it with very small size
Its total charge on rod is dQ
so we will have potential at the center of curvature due to small point charge is given as
here given that
radius (R) = a
now the potential due to complete semicircular arc is given as
we know that
now we have