*57%*:**Modular Approach to Physics: Vector Addition Practice - Three Vectors***55%*:**Test of understanding of vectors: A reliable multiple-choice vector concept test***54%*:**Tracing Difficulties With Relativistically Invariant Mass To Difficulties With Vector Addition Of Momentum In Newtonian Contexts***53%*:**Students' difficulties with unit vectors and scalar multiplication of a vector***50%*:**Vector Addition in Different Contexts***48%*:**MIT Physics 8.02: Vector Fields Visualizations - Cross Product of Two Vectors***46%*:**Illuminations: Learning About Properties of Vectors and Vector Sums Using Dynamic Software***41%*:**Studentsâ€™ Responses to Different Representations of a Vector Addition Question***38%*:**Walter Fendt Physics Applets: Resultant of Forces (Addition of Vectors)***38%*:**PhET Simulation: Vector Addition***38%*:**David Maloney's Physics Examples: Kinematics Example 4-Vector Addition***38%*:**Modular Approach to Physics: Vector Addition***38%*:**Modular Approach to Physics: Vector Addition - Tip-to-Tail Method***38%*:**Modular Approach to Physics: Vector Addition - Parallelogram Method***38%*:**Modular Approach to Physics: Addition of Three Vectors - Tip-to-Tail Method***38%*:**Boston University Physics Easy Java Simulation: Vector Addition - Patterns***38%*:**Boston University Physics Easy Java Simulation: Vector Addition- Integer components***38%*:**Boston University Physics Easy Java Simulation: Vector Addition**