Hai quả cầu kim loại nhỏ giống nhau mang điện tích q1 = 3 μC và q2 = -12 μC. Cho hai quả cầu tiếp xúc nhau rồi đặt hai quả cầu cách nhau 3 m. Lực tương tác tĩnh điện giữa chúng khi
đặt trong không khí là:
A. 20,25.10-3N.
B. 36.10-3N.
C. 2,025 N.
D. 0,36 N.

number of electrons for neutral cl

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