Brooke and Josiah both volunteer to participate in a 2-part experiment in their physics class. Both Brooke and Josiah weigh 68 kilograms. In part 1, they stand still, side-by-side, on skateboards. In part 2, Brooke
pushes against Josiah as the class records the results. The results are shown below.
Part 1
Save
No student pushes
No student moves.
Part 2
Brooke pushes Both students move.
against Josiah
Which statement is correct?
Part 1 is the first law, inertia. Part 2 is the third law, action reaction forces.
O Part 1 is the first law, inertia. Part 2 is the second law, net forces cause acceleration.
O Part 1 is the third law, action reaction forces. Part 2 the first law, inertia.

the correct choice is a .

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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.