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Answer:
The magnitude of electron acceleration is
Explanation:
Given:
Distance from the wire to the field point m
Speed of electron
Current A
For finding the acceleration,
First find the magnetic field due to wire,
Where
T
The magnetic force exerted on the electron passing through straight wire,
N
From the newton's second law
Where mass of electron
kg
So acceleration is given by,
Therefore, the magnitude of electron acceleration is
To solve the problem it is necessary to use Newton's second law and statistical equilibrium equations.
According to Newton's second law we have to
where,
m= mass
g = gravitational acceleration
For the balance to break, there must be a mass M located at the right end.
We will define the mass m as the mass of the body, located in an equidistant center of the corners equal to 4m.
In this way, applying the static equilibrium equations, we have to sum up torques at point B,
Regarding the forces we have,
Re-arrange to find M,
Therefore the maximum additional mass you could place on the right hand end of the plank and have the plank still be at rest is 16.67Kg
