Air is compressed adiabatically in a closed cylinder from a pressure of 1 bar, a temperature of 20°c and volume of 0.5m3 to a pressure of 6 bar. taking cp = 1.004 kj kg-1k-1 and cv = 0.718 kj kg-1k-1, determine: (a) the final volume,(b) the mass of air in the cylinder,(c) the change in internal energy

0.19 m/s and 0.45 m/s

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.