Achild is sitting on a stationary skateboard with a pile of rocks which she throws in one direction in order to make the skateboard travel in the opposite direction. if the rocks each have a mass of 0.40 kg and she can throw them with a speed of 14 m/s relative to the ground, determine the number of rocks she must throw per minute in order to maintain a constant average speed against a 2.1 n force of friction. (note: because this is a rate, the answer may not be a whole number.)

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

the following is queen elizabeth’s purposes:

- to encourage the parliament that the technique of picking successors to the seat based merely on birthright needs to be reviewed.

- (not) to convince the parliament that her kid should not be measured as a likely choice for heir to the english power.

- to persuade the parliament that merely since she has a child does not assure that the kid will be a capable leader.

- to sway the parliament how shattering it could be if they proceeded discourteously concerning her or her child.