Name: Period:______ Show work on this paper or a separate paper

```Name:____________________________________________
Period:_____________
Show work on this paper or a separate paper. Here is a formula for you: No Work= No Credit
Abel playing with physics.
1.
Why is Abel’s hair standing apart?
A. Electrons have moved from the van der graaf to his hair strands giving each one a negative charge.
B. Protons have moved from the van der graaf to his hair strands giving each one a positive charge.
C. Well, shoot, I don’t really know and googling an answer isn’t really my thing.
2.
What is the repulsive electrical force between two protons that are 8.5 nanometers apart?
3.
Two charged objects have a repulsive force of .035 N. If the charge of one of the objects is doubled, then what is
the new force?
4. Two charged objects have a repulsive force of .045 N. If the distance separating the
objects is tripled, then what is the new force?
5. Suppose that two spheres with the same magnitude of charge attract each other with a force of 0.75 N when
placed a distance of 9 cm from each other. Determine the charge of each sphere.
Sphere 1:___________
Sphere 2:__________
Due next class for a quiz grade. If turned in on time, this will be an optional test grade.
YES
NO
Name:____________________________________________
Period:_____________
Show work on this paper or a separate paper. Here is a formula for you: No Work= No Credit
A
B
C
6. Consider the three particles above. Particles A, B, and C have charges of 5 C, -7 C, and -6 C, respectively. The
distance from A to B is 0.4 cm. The distance from B to C is also 0.4 cm. What is the net force (magnitude and
direction) acting on particle B?
Magnitude of force:______________________
Direction of force:
7.
Left or Right
Consider the three particles to the right. All three particles
The top particle has a charge of 25 μC. The bottom left
Particle has a charge of 15 μC. The bottom right particle has a
Charge of 20 μC. What is the net force on the bottom left particle?
Magnitude of force:___________
True Angle:_____________
Due next class for a quiz grade. If turned in on time, this will be an optional test grade.
YES
NO
```