A4,000 kg boat floats with one-third of its volume submerged. if two more people get into the boat, each of whom weighs 690 n, what additional volume of water is displaced?

The weightiness of the added water displaced is equivalent to the joined weight of the two extra people who come to be into the boat:

m water g                   = 2 x 690 N

                                   = 1,380 N

The mass of the water displace is then

m water g                   = 1,380 N

                                   = 1,380 N / 9.8 m/s^2

                                   = 141 kg

Compute the calculation for density for the volume of water displace and practice this outcome for the mass of the water displace to get the

p water                      = mass of water / volume of water

volume of water        = mass of water / p water

                                  = 141 kg / 1000 kg /m^3 eliminate kilogram

                                  = 0.14 m^3 the additional volume of water that is displaced

think its the third option

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.