9) During 5th period Dylan was a beast. She resisted the forces applied by 13 other students in her class all at once. Her 13 classmates tried to knock Dylan over, each applying a force of 17 N, and she still didn't budge. How much force was Dylan
pushing back with, and how many people would it take to push Dylan if she can withstand a force of 300 N?

it may be wrong but i think its a

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.

it is b. absorbs thermal energy