A wire that is 0.36 meters long moves perpendicularly through a magnetic field at a speed of 0.21 meters/second. The induced emf
2 answers:
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The force the box is exerting on Manuel is the weight of the box, downward:
and this force is perfectly balanced by the constraint reaction applied by Manuel's hand, pushing upward.
and this force is perfectly balanced by the constraint reaction applied by Manuel's hand, pushing upward.
Answer:
The coefficient of static friction between the object and the disk is 0.087.
Explanation:
According to the statement, the object on the disk experiments a centrifugal force due to static friction. From 2nd Newton's Law, we can represent the object by the following formula:
(1)
(2)
Where:
- Normal force from the ground on the object, measured in newtons.
- Mass of the object, measured in newtons.
- Gravitational acceleration, measured in meters per square second.
- Linear speed of rotation of the disk, measured in meters per second.
- Distance of the object from the center of the disk, measured in meters.
By applying (2) on (1), we obtain the following formula:
If we know that ,
and
, then the coefficient of static friction between the object and the disk is:
The coefficient of static friction between the object and the disk is 0.087.