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What is a scalar quantity?
A physical quantity with only magnitude. e.g. speed, mass, temperature, energy
What is a vector quantity?
A physical quantity with both magnitude and direction. e.g. velocity, force, displacement
What is the parallelogram law of vectors?
If two vectors are represented by adjacent sides of a parallelogram, their resultant is the diagonal
What is projectile motion?
Motion of an object thrown at an angle — combination of horizontal uniform motion and vertical free fall
What is the range of a projectile?
R = u²sin2θ/g — maximum range at 45°
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