Understanding the Electrostatic Model

Q.

What does an axiom mean?

1. The laws of nature which explain cause and effect

2. Definitions! made to express long sentences smartly

3. Statement or proposition which is regarded as established, accepted or self-evidently true.

4. The logical predictions of a model.

Q.

What do we mean when we say we completely understand mechanics?

1. That we can explain any mechanical observation by bringing it down to the assumptions of the model of Mechanics.

2. That we know the definition of distance, displacement, acceleration and all these variables.

3. That we know how to draw a free body diagram alone

4. That we can question the correctness of Newton’s laws

Q.

What do we mean when we say we completely understand mechanics?

1. That we can explain any mechanical observation by bringing it down to the assumptions of the model of Mechanics.

2. That we know the definition of distance, displacement, acceleration and all these variables.

3. That we know how to draw a free body diagram alone

4. That we can question the correctness of Newton’s laws

Q.

Point charges $Q_1=5mC$ (millicoulomb) and $Q_2=6mC$ (millicoulomb) are at a separation of 100m from each other. What is the magnitude of force on any one of the charge?

1. 27N

2. 25N on $Q_1$ and 24N on $Q_2$

3. 23N

4. not enough information is given in the question.