Kinematics / Translational Motion

Question 1

quantity w/ magnitude but no direction

Ex: Speed, distance, time

Answer 1

scalar

Question 2

quantity w/ magnitude and direction

Ex: velocity, displacement, Force, momentum

Answer 2

vector

Question 3

Trig function: Opposite side of triangle

Answer 3

O = H * sin(ø)

Question 4

Trig function: adjacent side of triangle

Answer 4

A = H * cos(ø)

Question 5

Equation: Pythagorean Theorem

Answer 5

a^2 + b^2 = c^2

Question 6

vector whose magnitude is the shortest distance between the initial and final positions of the motion and chose direction points from the initial to the final position

Answer 6

displacement (∆x)

SI Unit = meters (m)

Question 7

Equation: Average Speed (v)

Answer 7

Average Speed (V) = distance / time
SI Unit = m/s

Question 8

Equation: Average Velocity (Vavg)

Answer 8

V(avg) = displacement / time = (x - x0) / (t - t0) = ∆x / ∆t

SI Unit = m/s

Question 9

Equation: Acceleration (avg)

Answer 9

Acceleration (avg) = change in velocity / time = v - v0 / t - t0 = ∆v / ∆t
SI unit = meter / second^2 (m/s^2)

Question 10

If velocity of an object is changing (in either magnitude OR direction), the object is ________

Answer 10

accelerating

Question 11

on a displacement versus time graph, a straight line (slope = constant) indicated _____

Answer 11

velocity = constant 
acceleration = 0

Question 12

on a displacement versus time graph, a horizontal line parallel w/ the X axis indicates ______

Answer 12

velocity = 0
acceleration = 0

Question 13

on a displacement versus time graph, a line curved upward (exponential or inverse curve) indicates _______

Answer 13

velocity is changing

acceleration does NOT equal 0

Question 14

on a velocity vs time graph, a straight line (slope = constant) indicates _____

Answer 14

increasing velocity

constant acceleration

Question 15

on a velocity vs time graph, the area under the curve =

Answer 15

displacement

Question 16

on a velocity vs time graph, a horizontal line (parallel w/ the x axis) indicates ______

Answer 16

constant velocity

no acceleration

Question 17

on a velocity vs time graph, a straight line going in the opposite direction of the first (i.e. negative slope if first line was positive) indicates ______

Answer 17

increasing velocity in the opposite direction

constant acceleration

Question 18

Equation: Final velocity (w/ constant acceleration)

Answer 18

v(f) = v(0) + a * t

Question 19

Equation: Final velocity (w/ constant acceleration and displacement)

Answer 19

v(f)^2 = v(0)^2 + 2 * a * ∆x

Question 20

Equation: Displacement w/ initial and final velocity (acceleration is constant)

Answer 20

∆x = 1/2 [v(o) + v(f)] * t

Question 21

Equation: Displacement w/ initial velocity and constant acceleration

Answer 21

∆x = v(o) * t + 1/2 * a * t^2