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Any question in physics will boil down to a simple conservation law, even at the relatively difficult A level exams.

Basically, in order to successfully solve this question, you need to identify 3 ...

When one is faced with a problem requiring derivation of an equation, they might be asked to use dimensional analysis. This is a concept that involves analyzing the units of known ...

Apply differentiation through first principles and understand the first principles to find the derivatives of common functions. 

A system is in equilibrium when there is no resultant force and no resultant torque (or moment). A moment is the turning effect of applying a force on a body. It is the product of the force and the perpen...

Moment = force x distance

Pirate:

 force = 65 x 9.81 =637.65

distance = 1.2

moment = 637.65 x 1.6 =1020.24 = 1020 Nm (3 sig fig)

Parrot:

force = 1.1x 9.81 = 10.79...