In kynematics you describe the motion of particles using vectors and their change in time. You define a position vector r for a particle, and then define velocity v and acceleration a as
In dynamics Newton's laws predict the acceleration for a given force. Knowing the acceleration, and the kynematical relations defines above, you can solve for the position as a function of time: r(t)
Answer: Electric field vector is created by an electric force of a charged particle.
Explanation: The direction of the field vector can be determined by applying Coulomb’s Law which explains the electric force between charge particles. If q is positive the force is repulsive, to a test charge ( which is positive always ) and if q is negative the force is attractive to a test charge.
Because people do not like being told what to do.
We know that either team is winning which means that the cumulative forces (sum of each girl force) on both teams are equal.
This means,
being x the force of the fourth girl on the east team.
Solving to x, you get
The fourth girl on the east is pulling with a force of 220N.
