Title: formative questions
Course: Physics copy 1

Q: [Image: girl rubbing hair and balloin]
When you rub a balloon in your hair, your hair will stand up and be attracted to the balloon. Has the amount of charge on the balloon and your hair.
- remained the same.
- increased.
- decreased.
A: remained the same.

Q: [Image: charged particles]

The following particles all carry a charge except
- elements
- ions
- electrons
- protons
A: elements

Q: When two like charged particles (eg positive and positive) are brought closer together, do you think the force between them:
- decreases as they get closer together.
- increases as they get closer together .
- stays the same as they get closer together.
A: increases as they get closer together .

Q: Considering your answers above, do you think force between like charged particles
- varies directly with the distance between them.
- varies directly with the square of the distance between them.
- varies inversely with the distance between them.
- varies inverselywith the square of the distance between them.
A: varies inversely with the distance between them.

Q: Do you think the force between charged particles:
- increases as charge increases.
- decreases as charge increases.
- stays the same.
A: increases as charge increases.

Q: Do you think the force between charged particles varies
- directly with the size of the charge.
- directly with the square of the charge.
- inversely with the size of the charge.
- inversely with the square of the size of the charge.
A: directly with the size of the charge.

Q: What do you think an appropriate relationship for the force between charged particles would be?(q represents size of charge)
- $$F=\frac{kq_1q_2}{r^2}$$
- $$F=\frac{k{q_1}^2 {q_2}^2}{r}$$
- $$F=\frac{r}{kq_1q_2}$$
- $$F=\frac{r}{k{q_1}^2{q_2}^2}$$
A: $$F=\frac{kq_1q_2}{r^2}$$

Q: Newton's Third Law may be summarized graphically as follows: \F_12 = -F_21 What do you think the symbols represent?
A: newtons third law