In these figures, we see a boy named Billy riding a carnival ride called the Rot
ID: 1399083 • Letter: I
Question
In these figures, we see a boy named Billy riding a carnival ride called the Rotor and the free-body diagram for the forces acting on him. What must be the magnitudes of the vectors fwall,Billy and WEarth,Billy if Billy remains at the same height along the wall?
fwall,Billy is greater than WEarth,Billy to keep Billy from falling.
Nwall,Billy and fwall,Billy must be equal in magnitude.
fwall,Billy depends on the magnitude of Nwall,Billy , but the magnitude of WEarth,Billy is always the same.
The magnitudes of fwall,Billy and WEarth,Billy are equal.
Explanation / Answer
To keep him at the same height upward force should be equal to downward force on Billy
So that net force along vertical direction would remain zero and he will not accelerate along this direction
F wall Billy = W Earth Billy
The magnitudes of fwall,Billy and WEarth,Billy are equal
It is also true that
fwall,Billy depends on the magnitude of Nwall,Billy , but the magnitude of WEarth,Billy is always the same.
because upward force would be due to friction and friction is proportioanl to the normal force