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What is three fold axis in case of ABCABC……. or CCP (cubic close packing) in 3 dimentions?
What is six fold axis incase of ABAB…..or hexagonal close packing (hcp) in three dimention?
What is meaning of statement given below-“In hexagonal unit cell three unit cells are shown to give hexagon.”
What is difference between BBC and HCP since both are of ABAB…. Type
Explain in detail with diagram
|Partho Pratim Mitra|
Three identical cars A, B and C are moving at the same speed on three bridges. The car A goes on a plane bridge, B on a bridge convex upward and C goes on a bridge concave upward. Let F1, F2 and F3 be the normal forces exerted by the cars A,B and C respectively on the bridges when they are at the middle of bridge.
a) F1 Is maximum of the three forces
b) F2 is maximum of the three forces
c F3 is maximum of the three forces
d) F1= F2 = F3
What is the answer of the above question? What is the meaning of “normal forces exerted by the cars on the bridges” mentioned in the question? Is it normal reaction or weight?
Please explain option ‘c’ and ‘d’ in detail.