Transcript What if Anything is Wrong Task on Electric Charge

What if Anything is
Wrong
Force between Electric Charges
Task Description
Four charged objects will be shown in a
simulation. The net force on object due to
all of the other charged objects is shown
with an arrow. When two of the objects are
brought close to each other, the net force
will be largely between the two charges.
Observe the simulation and then answer
the following questions about what if
anything is wrong.
What, if anything, is wrong with the
simulation?
...
...
fa
ile
d
to
th
e
fo
rc
es
e
Th
Th
e
fo
rc
e
w
as
in
w
as
fo
rc
e
e
Th
in
th
e
...
ro
ng
w
th
in
g
no
4.
is
3.
25% 25% 25% 25%
er
e
2.
There is nothing
wrong
The force was in the
wrong direction on
one charge
The force was in the
wrong direction on a
pair of charges
The forces failed to
obey Newton’s third
law
Th
1.
Which pair of particles had a force
inconsistent with the others?
4.
5.
6.
Th
er
e
is
no
7.
1
2
3
4
5
ro
ng
A
an
d
B
A
an
d
C
A
an
d
D
B
an
d
C
B
an
d
D
C
an
d
D
3.
w
2.
14% 14% 14% 14% 14% 14% 14%
th
in
g
There is nothing wrong
A and B
A and C
A and D
B and C
B and D
C and D
1.
What was wrong with the force
vectors?
There is nothing
wrong
One of the force
arrows pointed the
wrong way
Both force arrows
pointed the wrong way
2
3
4
5
..
po
.
fo
rc
e
th
ot
h
O
ne
of
is
er
e
Th
1
ar
ro
w
s
ar
ro
..
e
no
fo
rc
e
th
in
g
w
3.
B
2.
33% 33% 33%
ro
ng
1.
Three students are having a
conversation about the fact that
the electrostatic force can be
both attractive and repulsive
and what this means about
charge.
Student A: “The fact that the
force is both repulsive and
attractive means there are
exactly two types of charge.
After all, opposites attract and
likes repel.”
Student B: “There are more
than two types of charge. An
uncharged aluminum can is
attracted to a charged rod. So
neutral is also a charge.”
Student C: “There could be
more than two types of charge.
You could have two groups of
charges that repelled each other
within a group, but attracted
charges in the other group.”
With which student do you
agree?
1
2
3
4
5
Id
on
’t
a
gr
e
e
w
ith
an
A
4.
y.
..
3.
C
2.
25% 25% 25% 25%
B
A
B
C
I don’t agree with
any of them
1.
Why did you agree with that
student?
1
2
3
4
5
w
ith
an
...
so
n
gr
ee
id
n’
ta
Id
m
e
ot
he
r
re
a
ul
s.
re
p
So
tio
n
ttr
ac
A
..
...
je
c
ob
tra
l
ne
u
nc
e
Si
Ik
no
w
th
e
re
ar
e
5.
ts
on
ly
.
4.
d
3.
an
2.
20% 20% 20% 20% 20%
..
I know there are only two
types of charge
Since neutral objects attract,
they must be charged
Attraction and repulsion imply
at least two types of charge.
There could be more.
Some other reason
I didn’t agree with any of
them
1.