What are the units for electric current
1 answer:
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Answer:
a) The tangential component of acceleration at the edge of the motor at is -1.075 meters per square second.
b) The electric motor will take approximately 3.963 seconds to decrease its angular velocity by 75 %.
Explanation:
The angular aceleration of the electric motor (), measured in radians per square second, as a function of time (
), measured in seconds, is determined by the following formula:
(1)
The function for the angular velocity of the electric motor (), measured in radians per second, is found by integration:
(2)
Where is the initial angular velocity, measured in radians per second.
a) The tangential component of aceleration (), measured in meters per square second, is defined by the following formula:
(3)
Where is the radius of the electric motor, measured in meters.
If we know that ,
and
, then the tangential component of the acceleration at the edge of the motor is:
The tangential component of acceleration at the edge of the motor at is -1.075 meters per square second.
b) If we know that and
, then the time needed is:
The electric motor will take approximately 3.963 seconds to decrease its angular velocity by 75 %.
Work is considered as the Force performed on a body to move it a certain distance, that is
W = Fd
Here
W = Work
F = Force
d = Distance
In this case we have the values of work and distance, therefore clearing for the Force we would have to
Replacing,
Therefore the force that Marissa must exert on the windows shade is 0.4N