Atop a cliff, a rock is thrown vertically upward and reaches maximum altitude in 1.59 sec. Later the rock reaches a speed of 23.4 m/s just before hitting the ground at the base of the cliff. How high is the cliff in meters? Express algebraic solution in terms of tm, vf, and g.

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.

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.