A glass marble, X, moving with velocity 6ms^-1, collides 'head on' with an identical stationary glass marble, Y. What is the velocity of Y after the collision, assuming that X comes to rest?

their crystal patterns have been disrupted by stress

measure their densities same density, same sub

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.