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2 answers:
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Explanation:
It is given that,
Electric field,
The relation between the electric force and the electric field is given by :
Where
q is the charge
(a) Charge on the electron,
Electrostatic force,
(b) If an electron is missing, the net charge remains the same only sign changes.
So, force becomes,
Hence, this is the required solution.
The net force in the x-direction is 100 N forward
Explanation:
To answer the question, we just need to care about the forces acting along the x-direction.
Along this direction, we have:
- The pedaling force, forward, of magnitude F = 400 N
- The air resistance, acting backward, of magnitude R = 300 N
Taking forward as positive direction, this means that we can rewrite the two forces as
F = 400 N
R = -300 N
Therefore, the net force in the x-direction is
And the positive sign means its direction is forward.
Learn more about forces here:
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