Aspherical iron ball bearing of diameter 4mm is placed on a light piece of styrofoam floating in a cylinder of oil as shown in the figure below. you may assume that the weight of the styrofoam is negligible. density of iron is 7.86g/cm^3; density of oil is 0.83g/cm^3
a) determine the maximum load that the styrofoam cup can carry before it sinks.
b) calculate the uptrust acting on the piece of styrofoam.
c) what is the volume of oil displaced by the piece of styrofoam and the iron ball bearing?
d) the ball bearing rolls off the piece of styrofoam and falls into the oil. will the oil level be higher, lower or the same as before? explain your answer.

answer: strength i guess

explanation:

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.

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j