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Classical Mechanics

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Classical Mechanics

Efficiency

The ratio of useful work output to total energy input for a machine or system.

η = (W_output / E_input) × 100% %
Classical Mechanics

Elastic Collision

A collision between bodies in which both total linear momentum and total kinetic energy are conserved.

∑ p_i = ∑ p_f, ∑ KE_i = ∑ KE_f kg·m/s, J
Classical Mechanics

Elasticity

The mechanical property of a material to deform under applied stress and return to its original shape when stress is removed.

Stress / Strain = Elastic Modulus (E) Pa (N/m²)
Classical Mechanics

Escape Velocity

The minimum speed required for a ballistic object to escape a massive body's gravitational field without further propulsion.

v_esc = √(2 G M / R) m/s