Flashcards in Units and Kinematics Deck (11):
Quantity that has both magnitude and direction. Examples: displacement, velocity, force, acceleration, momentum, electric field strength, and magnetic field strength.
Quantity that has only magnitude. Examples: mass, length, time, density, energy, and temperature.
Name the common trigonometric relationships.
sin θ = opposite/ hypotenuse -- sin 30 = 1/2
cos θ = adjacent/ hypotenuse -- cos 60 = 1/2
tan θ = opposite/ adjacent
How do you find the magnitude of a vector?
Use the Pythagorean Theorem. Also use the theorem to find the components of a vector, particularly while working with projectile motion.
Vector quantity describing the straight line distance between the initial and final position.
A vector quantity describing displacement over time. v = Δx/ Δt.
At a single instant in time, v = lim Δx/ Δt, Δt --> 0
A scalar quantity describing the actual distance traveled over time, s = d/ Δt
A vector quantity describing the change in velocity over the change in time, a = Δv/ Δt.
At a single instant in time, a = lim Δv/ Δt, Δt --> 0