A positron ( the antiparticle of electron ) has a mass of 9.11x10^-31kg and a charge +e=+1.6x10^-19 C. Suppose a positron moves in the vicinity of an alpha particle, which has a charge +2e=3.20x 10^-19 C. The alpha particle is more than 7000 times as massive as the positron, so we assume that it is at rest in some inertial frame inference. When the positron is 1.00x 10^-10m from the alpha particle, it is moving directly away from the alpha particle at a speed of 3.00x 10^6 m/s. (a). What is the position's speed he the particles are 2.00 x 10^-10m apart?
(b)What is the position's speed when it is very far away from the alpha particle?
(c) How would the situation change if the moving particle were an electron (same mass as the positron but opposite charge)?

answer; ///i do believe that the correct answer is ; ///(physical change);

1/0.14nm = 10^10/1.4 a lot

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.

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle