<span>The gravitational force is 10 N down, and the force of air resistance is 1 N up.
The 1 N up exactly cancels one of the 10 N down.
What's left is the net force on the ball . . . . . 9 N down.</span>
Sickle-cell disease is common in tropical and sub-tropical regions because being a carrier, carrying a single sickle-cell mutation (sickle cell trait), affords some resistance to malaria.
Explanation:
Given that, a hiker walls 9.4 miles at an angle of 60 degrees south of west. We need to find the west and south components of the walk.
From the attached figure, it is clear that, the west component of the walk is given by :
The south component of the walk is given by :
So, the west and south components of the walk are 4.7 miles and 8.14 miles respectively. Hence, this is the required solution.