Units and Kinematics Flashcards Preview

MCAT Physical Sciences > Units and Kinematics > Flashcards

Flashcards in Units and Kinematics Deck (11):
1

Vector

Quantity that has both magnitude and direction. Examples: displacement, velocity, force, acceleration, momentum, electric field strength, and magnetic field strength.

2

Scalar

Quantity that has only magnitude. Examples: mass, length, time, density, energy, and temperature.

3

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

4

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.

5

Displacement

Vector quantity describing the straight line distance between the initial and final position.

6

Velocity

A vector quantity describing displacement over time. v = Δx/ Δt.

7

Instantaneous Velocity

At a single instant in time, v = lim Δx/ Δt, Δt --> 0

8

Speed

A scalar quantity describing the actual distance traveled over time, s = d/ Δt

9

Acceleration

A vector quantity describing the change in velocity over the change in time, a = Δv/ Δt.

10

Instantaneous Acceleration

At a single instant in time, a = lim Δv/ Δt, Δt --> 0

11

Which five equations describe motion with constant acceleration?

v = v0 + at
Δd = v0t + (at^2)/2
vf^2 - v0^2 = 2aΔd
v = (v0 + vf)/ 2
Δd = vt = ((v0 + vf)/ 2) t