Abeaker is filled with water. a small plastic container contains a solid bar of aluminum, which has a mass of 40 g, and is placed on the water so that it floats. the water level reads 60 ml. next, the bar of aluminum is taken out of the container and placed in the water so that it sinks to the bottom. the water level in the beaker

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.

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y

friction

explanation:

they us to move forward and backwards