530	NICHOLLa S SEAMANSHIP  AND  NAUTICAL  KNOWLEDGE
New KG = °^-   = 14-56 feet.
olUU
but KM when loaded= 15-70   „
therefore her QM   = 1-14 feet.
Required (1) the transverse BM, (2) the longitudinal BM of a
box-shaped vessel, length 150ft., breadth 30ft, draught 15 ft.
• B2        30x30
150x150
QUESTIONS.
 1.	What is meant by the moment of a force ?
 2.	What conditions must be fulfilled to maintain equilibrium
when parallel forces are acting on a body ?
 3.	Explain what is meant by moment=arm x weight.
 4.	What is the difference between levers of the first, second and
third class ?
 5.	Describe and illustrate what is meant by a couple.
 6.	Describe what is meant by a body being in stable, unstable
and neutral eqxiilibrium.   Illustrate your answer in the case of a
cone.
 7.	Explain what is meant by (i) displacement; (ii) coefficient of
fineness of a ship.
 8.	Define the terms (i) centre of buoyancy ; (ii) centre of gravity ;
(iii) transverse metacentre; (iv) moment of stability as applied to a
ship.
 9.	Draw figures and describe exactly the conditions required to
produce stable, unstable and neutral equilibrium in a 'ship.

 10.	A ship at sea rolls violently, what may this be attributed to 1
 11.	Explain what is meant by a ship being (i) too stiff;  (ii) too
tender ; and what might be done to remedy the conditions ?