A 0.2-cm-thick, 15-cm-long and 10 cm wide circuit board houses electronic components on one side that dissipate a total of 15 W of heat uniformly. The board is impregnated with a conducting metal fillings and has effective thermal conductivity of 15 W/m. K. All the heat generated in the components is conducted across the circuit board and is dissipated from the back side of the board to medium at 20 oC with heat transfer coefficient of 50 W/m2.K. 1) Determine surface temperature of the two side of the board. (2 points) 2) Now .1-cm-thick, 10-cm-high and 15-cm-long aluminum plate (k

the amount of current in the coil

that would be because of both gravity and friction. so     c

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.