A -50 nC charged particle is in a uniform electric field E = (30 V/m , east). An external force moves the particle 3.0 m north, then 6.0 m east, then 6.0 m south, and finally 5.0 m west. The particle begins and ends its motion with zero velocity.

a) How much work is done on it by the external force?

b) What is the potential difference between the particle's final and initial positions?

this isn't the answer but they're the graphs

which statement about this sum is true? −245+2.7

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.