4-6

Question 1

Displacement & Velocity

study of motion

Answer 1

mechanics

Question 2

Displacement & Velocity

description of motion or how it moves

Answer 2

kinematics

Question 3

Displacement & Velocity

explaining motion or what are the forces that brings into motion

Answer 3

dynamics

Question 4

Displacement & Velocity

treating objects as particles (points) to make things simple

Answer 4

idealization

Question 5

Displacement & Velocity

always has a reference point to the actual location of object or points from common reference point

Answer 5

position

Question 6

Displacement & Velocity

initial to final position or shortest directed distance & path independent

Answer 6

displacement

Question 7

Displacement & Velocity

length of the path you took & path dependent

Answer 7

distance

Question 8

Displacement & Velocity

the areas of velocity vs. time curve

Answer 8

displacement

Question 9

Displacement & Velocity

when an object is moving with the same rate of change of velocity

Answer 9

constant acceleration

Question 10

Displacement & Velocity

the areas of acceleration vs. time curve

Answer 10

velocity

Question 11

Displacement & Velocity

is a scalar quantity that states when and how long the motion occurs

Answer 11

time

Question 12

Displacement & Velocity

is used in referring to a specific time an object is at a particular point

Answer 12

time interval

∆t = t2 − t1

Question 13

Displacement & Velocity

refers to the time rate change of an object’s
position between its initial and final positions

Answer 13

average velocity

vav−x = x2 − x1/t2 − t1 = ∆x/∆t

Question 14

Displacement & Velocity

is the slope of the line connecting x1 and x2

Answer 14

average velocity

Question 15

represents the time progression of an object’s position (report motion)

Answer 15

position time (x-t) graph

Question 16

velocity at a specific instant in time and is the slope of the tangent line in the x-t graph (average velocity)

Answer 16

instantaneous velocity

Question 17

is the slope of the line joining v1 and v2 (average acceleration)

Answer 17

velocity-time (v-t) graph

Question 18

acceleration at a specific instant in time and slope of the tangent line in the v-t graph

Answer 18

instantaneous acceleration

Question 19

Acceleration

is the rate of change of velocity with time

Answer 19

acceleration

Question 20

Acceleration

the slope in velocity vs. time graph represented by

Answer 20

acceleration

Question 21

Acceleration

accelerates in the direction of velocity means

Answer 21

speeding up

Question 22

Acceleration

accelerates against the velocity means

Answer 22

slowing down

Question 23

Acceleration

accelerates at a direction that neither parallel or anti-parallel its motion means

Answer 23

change in direction

Question 24

Acceleration

(+) velocity, (-) acceleration
(-) velocity, (+) acceleration

Answer 24

slowing down

Question 25

# Acceleration (+) velocity, (+) acceleration (-) velocity, (-) acceleration

Answer 25

speeding up

Question 26

# Uniformly Accelerated Motion and Free Fall if an object has a constant acceleration, the instantaneous acceleration is equal to the average acceleration

Answer 26

uniform acceleration

Question 27

# Uniformly Accelerated Motion and Free Fall constant acceleration of a body falling under the influence of the earth's gravitational attraction

Answer 27

free fall

Question 28

# Uniformly Accelerated Motion and Free Fall - gravitational pull of Earth **results accelerated falling motion** - acceleration of object **varies with distance** from Earth's surface - acceleration **does not vary with mass** - constant acceleration due to gravity is **9.8 m/s^2** - any falling body will **experience air resistance**, slowing down its motion

Answer 28

Freefall Facts

Question 29

# Uniformly Accelerated Motion and Free Fall - **neglect air resistance** - all bodies at a particular location fall with the **same downward acceleration regardless of size and shape** - distance of fall is **smaller than radius of the Earth** - **ignore effects** due to the earth’s rotation

Answer 29

Freefall Assumptions