LHTB Physics Pre-Exam (2.2 Mechanics – Statics)

An insulator has its electrons

• tightly bound

• loosely bound

• totally free from electrons

The centre of gravity of an aircraft is adjusted by two weights, 10 kg and 5 ckg plaed 4m and 2 m aft of the c of g. To what position must a 20 kg weight be added to balance the c of g?

• 2.5m

• 4m

• 2m

For the CGS system, the force is...

• the 'dyne' which produces an acceleration of 1cm/ s2 for a mass of gram

• the 'pd1' which produces an acceleration of 1 cm/s2 for a mass of gram.

• the 'N' which produces an acceration of 1 cm/s2 for a mass of gram.

The quadrature component of a vector is...

• 90 degrees to the original

• 180 degrees to the original

• 45 degrees to the original

1 Newton is equal to

• 1 kilogram meter per second per second

• 1 kilogram of force

• 1 joule per second

The SI unit of mass is the

• kg

• lb

• slug

slug is a unit of…

• speed

• mass

• weight

If an object in air is submerged in a liquid or a gas its weight will…

• increase

• decrease

• remain the same

If a material is loaded excessively and is permanently deformed, it is said to be...

• strained

• stressed

• stretched

The SI unit of force is the…

• Newton

• Metre

• Pascal