Answer :
The hill makes a 23° angle with the horizontal.
briefly:-
To hold a 23-pound crate on a hill, 6 pounds of force must be used.
Let's say the hill is at an angle to the ground.
There will be two weight components, one running parallel to the hill and the other perpendicular.
The only part that pushes the crate rearward is the one along the hill.
So,
23sin θ= 9
sin θ= 9/23
θ= 23°
How do land surveyors calculate slope?
The gradient is determined similarly to how slope can be measured as a percentage. Divide the increase by the run after changing the rise and run's units to match.
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