Why does a ferromagnetic material exhibit magnetic behavior when it is in contact with a magnet? b. if you were to magnetize the same ferromagnetic material so that exhibits magnetic behavior on its own, do you think it would be stronger or weaker than in case (a)? explain why you think so. c. why do you think an electromagnet is stronger than a natural magnet?

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.