A car is driving northwest at mph across a sloping plain whose height, in feet above sea level, at a point miles north and miles east of a city is given by ℎ(,)=1250+125+50. (a) At what rate is the height above sea level changing with respect to distance in the direction the car is driving? rate = (b) Express the rate of change of the height of the car with respect to time in terms of . rate =

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i think the answer is a and b

i wish you luck

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.