GIKI Engineering Computing MCQs

Volume flow rate is Q=Av.
Q=0.04×3 = 0.12 m³/s.

Continuity gives A₁v₁=A₂v₂.
V₂=0.06×2/0.02 = 6 m/s.

Strain compares deformation with original dimension.
It is dimensionless.

Universal gravitation applies to any pair of masses.
The force acts along the line joining their centers.

Young's modulus measures material stiffness.
A larger value means less strain for a given stress.

Gravitational field strength is g=F/m.
Its unit is N/kg, equivalent to m/s².

Use F=Gm₁m₂/r².
F=6.67×10^-11×2×3 = 4.002×10^-10 N.

Gravitational potential is a scalar quantity.
It represents work per unit mass associated with position.

Gravitational force varies inversely with distance squared.
Doubling distance multiplies force by 1/2² = 1/4.

Orbital objects still experience gravity.
They appear weightless because all parts accelerate together.

Field strength is force per unit mass.
G=20/4 = 5 N/kg.

Escape velocity depends on the body's mass and radius.
It is independent of the escaping object's mass.