For aeroplane are lift,weight,thrust and drag
For ships are inertia,drag,buoyancy and gravity
For physics, I would recommend to just keep doing practice problems and reviewing notes. Repetition of the same concepts will help drill it into your brain. Hope that helps!
The answer to which type of bond shows two or more atoms baring electrons is B. Covalent
Newton's second law of motion states the following:

In which

is the force,

is the mass, and

is the acceleration of the object.
So, the answer is B.