Why should society be concerned about continental drift and plate tectonics? what value does this research have for the public in general?

The people living in the society must be aware of the ongoing earth dynamic processes. The concept of plate tectonic is important as it helps us in understanding how our lithospheric plates, including oceanic as well as continental plate, moves from one place to another and how convection current operates in the mantle. Due to this tectonic activities, various consequences are being faced such as earthquake, volcanic activities, tsunami and so on.

So having a proper knowledge about this theories, people can be careful enough and can protect themselves from getting hurt. So this concept must be known to all and circulate among the people.

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.