A dogsled team is shown pulling a man on a sled. Below the picture is a free body diagram with 4 force vectors. The first vector is pointing downward, labeled F Subscript g Baseline = negative 50 N. The second vector is pointing left, labeled F Subscript f Baseline = negative 225 N. The third vector is pointing upward, labeled F Subscript N Baseline = 50 N. The fourth vector is pointing right, labeled F Subscript t Baseline = 225 N. The up and down vectors are the same length. The right and left vectors are the same length.
Using the free-body diagram, calculate the net force acting on the sled. Is the sled in a state of dynamic equilibrium?

statement #3 on andre"s list is false.

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.

answergravity;