During summer months, your ceiling fan blades should be set to spin counterclockwise. When your ceiling fan spins quickly in this direction, it pushes air down and creates a cool breeze.
As per Newton's 2nd law
we know that

it is product of mass and acceleration
here we know that

also we know that

so from above equation we have


so the force here will be 10020 N
Answer:
W = 0 J
Explanation:
It is given that,
Weight of the crate, W = 100 N
Distance moved by the crate, d = 1.5 m
Let W is the work done to hold the crate 1.5 m above the ground in this way. It is given by the product of force and the displacement. Its formula is given by :

Here,
as it is lifted vertically
W = 0
So, the work done to hold the crate is 0. Hence, this is the required solution.
Answer:
cellular respiration , note how it says oxygen
Answer:
(a) t = 2.97s
(b) h = 43.3 m
Explanation:
Let t be the time it takes to fall a distance h, then t - 1 (s) is the time it takes to fall a distance of h - 0.56h = 0.44 h
For the ball to fall from rest a distance of h after time t

Also for the ball to fall from rest a distance of 0.44h after time (t-1)

We can substitute the 1st equation into the 2nd one

and divide both sides by g/2






t = 2.97 or t = 0.6
Since t can only be > 1 s we will pick t = 2.97 s
(b)