A proton is projected into a magnetic field that is directed along the positive x axis. Find the direction of the magnetic force
1 answer:
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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.
Answer:
(a) 1, average velocity = -65.6 m/s
2, average velocity = -64.8 m/s
3, average velocity = -64.16 m/s
(b) The instantaneous velocity is -96 m/s
Explanation:
(a)
Average velocity is given by;
(1)
(2)
(3)
b. y = 235 - 16t²
The instantaneous velocity is given by;
v = dy /dt
dy / dt = -32t
when t = 3 s
v = -32(3)
v = -96 m/s