A white board is placed 1 meter away from a helium neon laser. When the shutter of the laser is opened, a circular red spot of diameter 2 mm is observed on the white board. If the white board is moved toward the laser so that it is 0.5 meter away from the laser. Choose the diameter of the beam that is expected on the white board. Consider the divergence of the laser beam. (a) 0.5 mm
(b) 1 mm
(c) 2 mm
(d) 4 mm
(e) 8 mm

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.