Consider an object of mass 10 kg on a frictionless inclined plane of 20°. a. What is the acceleration of the object?
(object sliding down an inclined frictionless surface),
b. Calculate the acceleration if a mass of 20kg is used
c. What is the acceleration of the object if the angle of inclination is 90 degrees? Explain the significance of the result

Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.