If a person is moving to the right, the net force acting upon her cannot be balanced
1 answer:
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Answer:
2.33 nC, 4.67 nC
Explanation:
when the two spheres are connected through the wire, the total charge (Q=7.00 nC) re-distribute to the two sphere in such a way that the two spheres are at same potential:
(1)
Keeping in mind the relationship between charge, voltage and capacitance:
we can re-write (1) as
(2)
where:
Q1, Q2 are the charges on the two spheres
C1, C2 are the capacitances of the two spheres
The capacitance of a sphere is given by
where R is the radius of the sphere. Substituting this into (2), we find
(3)
we also know that sphere 2 has twice the diameter of sphere 1, so the radius of sphere 2 is twice the radius of sphere 1:
So the eq.(3) becomes
And re-arranging it we find:
And since we know that the total charge is
we find
Answer:
0.32 s
Explanation:
Initial angular speed:
Final angular speed:
Angular rotation:
The angular acceleration of the drill can be found by using the equation:
Re-arranging it, we find , the angular acceleration:
Now we want to know the time t the drill takes to accelerate from
to
This can be found by using the equation
where is the angular acceleration we found previously. Solving for t,