14. jamal, a professional bicycle racer, is explaining to a group of students how technology has made it easier to
cycle faster. he states that bicycles can be made of much lighter materials now, so they need (sps8l2]
a. more force to push them forward.
c. more friction to keep them from rolling.
b. less force to push them forward. d. more gravity to increase their speed

scientific laws are the result of testing theories and proving them to be facts.

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.