Newton's third law of motion explains that forces come in pairs, action forces and reaction forces. If the action force is a person kicking a ball, what would be the reaction force? * A. The force of friction on the ball
B. The force of friction on the kicker
C. The force of the ball pushing on the kicker's foot
D. The force of gravity on the ball

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?