Question

What is the mechanical advantage of a wheel barrel that is 4cm long with 0.75m between the wheel and the center of the load?

Answer 1

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet

Answer 2

The mechanical advantage = 4/75

Step-by-step explanation:

A wheel barrel is a second class as the effort is placed further from the point of fulcrum than the point of action of the load

The parameters given are;

Length of wheel barrel = 4 cm

Distance between wheel and center of load = 0.75 m

Therefore, we have the mechanical advantage, MA given as follows;

`MA = (F_(o))/(F_(i)) = (L_(i))/(L_(o))`

`{F_(o)}` = Output force

`{F_(i)}` = Input force

`{L_(o)}` = Distance from output force = 0.75 m

`{L_(i)}` = Distance from input force = 4 cm = 0.04 m

Therefore;

`MA = (0.04)/(0.75) = (4)/(75)`

The mechanical advantage MA = 4/75 = 0.0533

Therefore, more force (75/4 × the load) will be required to lift a given load.