Physics Formulas and Equations is a nice app with elementary Physics Formulas. From this app you will get formula and equitation of these topics:

SI Base Units
Prefixes Used with SI Units
Some Derived SI Units
Physical Constants
Particles - Charge and Mass
Kinematics
Dynamics
Momentum and Energy
Waves
Optics
Fluid Mechanics and Thermal Physics
Electricity and Magnetism
Atomic and Nuclear Physics
Quantum Mechanics and Nuclear Physics
Trigonometry and Geometry
Graphing Calculator Window Format
Newtonian Mechanics
Related Calculus