Arock is suspended from a scale reads 20.0 n. a beaker of water (having a density of 1000 kg/m3) is raised up so the rock is totally submerged in the water. the scale now reads 12.5 n. what is the density of the rock?

a person with a mass of 106kg has a weight of 1060n

c. magnitude and direction

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.