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Physics Fundamentals
Master essential physics concepts including mechanics and electricity
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Card 1
What is Newton's First Law of Motion?
An object at rest stays at rest, and an object in motion stays in motion with the same speed and direction unless acted upon by an unbalanced force (Law of Inertia).
Card 2
What is Newton's Second Law of Motion?
Force equals mass times acceleration (F = ma). The acceleration of an object depends on the mass and the applied force.
Card 3
What is Newton's Third Law of Motion?
For every action, there is an equal and opposite reaction. Forces always occur in pairs.
Card 4
What is the difference between speed and velocity?
Speed is scalar (magnitude only). Velocity is vector (magnitude and direction). Example: 50 km/h is speed, 50 km/h north is velocity.
Card 5
What is the law of conservation of energy?
Energy cannot be created or destroyed, only converted from one form to another. Total energy in a closed system remains constant.
Card 6
What is Ohm's Law?