When the wedges are moved, predict which way the carts will move.

• towards each other
• away from each other
• not at all

How will the strength of the force between the cars change when the wedges are taken away and the cars are allowed to move?

• force will increase as they push apart

• force will increase as they come together

• force will decrease as they come together

• force will decrease as they push apart

How will the force between the sheets differ if this experiment were done with twice as much charge on each of the plates?

• the force will increase, pulling them together more

• the force will decrease, pulling them together less

• the force will increase, pushing them apart more

• the force will decrease, pushing them apart less

When the wedges are moved, predict which way the carts will move.

• towards each other
• away from each other
• not at all

How will the strength of the force between the cars change when the wedges are taken away and the cars are allowed to move?

• force will increase as they push apart

• force will increase as they come together

• force will decrease as they come together

• force will decrease as they push apart

What is the charge on the metal ball & the foil leaves in the initial state, at the beginning of the experiment?

• positive
• negative
• neutral

What are the possible charges on the rod at the beginning of the experiment?

• positive

• negative

• neutral

When the charged rod touches the metal ball, what happens to the charge on the metal rod?

• some of the same charge transfers to the ball

• nothing happens

• some of a different charge transfers to the ball

When the charged rod touches the metal ball, the foil leaves move apart because...

• they now have the opposite charge, transferred through the ball from the rod
• they now have the same charge, transferred through the ball from the rod

The charge on the green balloon is _____ because _____

• positive

• negative

• neutral

• moves toward the positive rod

• moves away from positive rod