When a force of 6N is applied to a block of mass 2kg. It moves along a table at constant velocity. A-What is the force of friction?
B- when the force is increased to 10N, what is the resultant force.
C- what is the velocity if it accelerates from rest for 10 seconds?
D-How far does it travel in 10 seconds?

the entire statement is true and correct.  

there's no diagram, nothing is illustrated, and no question is asked.

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.