Kinematics

Question 1

No acceleration

Answer 1

d= vt

Question 2

Uniform acceleration (constant)

Answer 2

d = V avg t

Question 3

No inital or final velocity (no way to know average velocity)

Answer 3

d= (Vi)(t) + 1/2 at2FROM REST: d=1/2 at2

Question 4

No time

Answer 4

vf2 = vi2 + 2ad

Question 5

Pico (p)

Answer 5

10-12

Question 6

Nano (n)

Answer 6

10-9

Question 7

Micro (µ)

Answer 7

10-6

Question 8

Milli (m)

Answer 8

10-3

Question 9

centi (c)

Answer 9

10-2

Question 10

kilo (k)

Answer 10

103

Question 11

mega (M)

Answer 11

106

Question 12

giga (G)

Answer 12

109

Question 13

Displacement

Answer 13

an objects change in position regardless of its path

Question 14

Average velocity

Answer 14

displacement / change in timeNOTE: if velocity happens to be constant there is no distinction between velocity and average velocity

Question 15

Velocity can best be defined as

Answer 15

how FAST an objects postion changes, speed and direction

Question 16

The magnitude of the velocity vector is called the _______

Answer 16

SPEED, Note: that speed is a scalar so it has no direction and can never be negative. Velocity is a vector that specifies both speed and direction

Question 17

Average acceleration

Answer 17

change in velocity / change in time* Acceleration is trickier than velocity, both involve how fast something changes, acceleration is how fast velocity changes and an objects velocity changes if the SPEED OR DIRECTION changes. Therefore, an object can be accelerating even if its speed is constant

Question 18

Acceleration in the same direction as velocity means the objects speed is

Answer 18

increasing

Question 19

Acceleration perpendicular to velocity means objects speed is ___________

Answer 19

constant

Question 20

acceleration in the opposite direction from velocity means objects speed is __________

Answer 20

decreasing

Question 21

acceleration at an angle between 0 degrees and 90 degrees to velocity means objects speed is __________ and direction of velocity is changing

Answer 21

increasing

Question 22

acceleration at an angle between 90 degrees and 180 degrees to velocity means objects speed is __________ and direction of velocity is changing

Answer 22

decreasing

Question 23

The slope of a position vs time graph gives the _______

Answer 23

velocity

Question 24

The area under a velocity vs time graph gives the __________

Answer 24

displacement

Question 25

The slope of a velocity vs. time graph gives the _________

Answer 25

acceleration

Question 26

Projectile motion

Answer 26

The motion of an object experiencing only the constant downward acceleration due to gravity (free fall)* MUST analyze vertical and horizontal motion separately

Question 27

Horizonta Projectile Motion

Answer 27

once the projectile is launched, it no longer experiences a horizontal acceleration, That is a (x) will be 0 throughout the projectiles flight. If the horizontal acceleration is 0 throughout the projectiles flight then the horizontal velocity will be constant throughout the flight . If the horizontal velocity does not change than whatever it is initially is all it will ever be ( horizontal velocity of the projectile at any point during flight will be equal to initial horizontal velocity, can use d= vt

Question 28

Vertical projectile motion

Answer 28

we realize that there is an accleration after all, the gravitational accleration is zero. MUST specify which direction is positive or negative, lets call up the positive direction and down the negative direction. NOTE: Vertical velocity will always be 0 at the top

Question 29

The projectiles total flight time will be _________ the time required to reach the top

Answer 29

TWICE