Aerial aquaculture patent

(1) The pulleys and axles in Figure B are fixed, so they are all crown blocks; The characteristic of crown block is that it does not exert force, but it can change the direction of force;

Therefore, the answer is: yes, it is neither labor-saving nor laborious;

(2) The resultant force of rope tension and OB rod support force is equal to the gravity of the car and parking rack. When the OB rod is lifted, the included angle between the supporting force direction of the OB rod to point B and the pulling force direction of the rope becomes smaller and smaller. When the BC rope is perpendicular to the OB rod, the rope tension is minimum, and the force acting on point B becomes smaller and smaller in this process.

(3) Save n every day? The useful work that the second car needs to do w = n (g1+g 2) h;

Solar energy absorbed by photovoltaic panels with an area of s/ day Q = ets.

Conversion of solar energy into electric energy w = q η1= ets η1;

According to the mechanical efficiency formula η= W, η 2 = N( G 1+G 2 )h? EtSη 1；

Therefore, the required photovoltaic panel area s = n (g1+g 2) h et η1η 2;

A: The required photovoltaic panel area is s = n (g1+g 2) h et η1η 2.