Unit 1 Test: Kinematics

Question 1

scalar

Answer 1

only has magnitude, no direction Ex: 5m/s

Question 2

vector

Answer 2

magnitude and direction ex: 5 m/s East

Question 3

distance

Answer 3

scalar, meters

Question 4

displacement

Answer 4

change in position, vector

Question 5

average speed

Answer 5

distance/ time; meters/per sec; scalar

Question 6

average velocity

Answer 6

displacement/change in time; meters/seconds, vector

Question 7

acceleration

Answer 7

how velocity changes over time, vector

Question 8

average acceleration

Answer 8

average velocity/ time

Question 9

position time graph constant speed

Answer 9

straight, diagonal line

Question 10

position time graph increasing velocity

Answer 10

exponential shape up to the right

Question 11

position time graph decreasing velocity

Answer 11

exponential shape down to the right

Question 12

velocity time graph constant velocity

Answer 12

straight line (not on orgin)

Question 13

velocity time graph increasing velocity/accelerating

Answer 13

straight diagonal up to the right

Question 14

velocity time graph decreasing

Answer 14

straight diagonal down to the right (not crossing orgin)

Question 15

position time graph

Answer 15

shows how position changes over time
-y-axis= position (x, cm)
-x-axis= time (t, seconds)
-slope of position time graph= velocity

Question 16

Velocity time graph

Answer 16

-shows how velocity changes over time
-straight line=0 acceleration
-slope of velocity time graph= acceleration
-under orgin line=moving backwards

Question 17

free fall

Answer 17

occurs when an object is moving through the air
-objects in free fall have acceleration of 10m/s^2
-if a ball dropped from rest:
-initial velocity is 0m/s
-acceleration is negative a=-10m/s^2
-ball thrown up: starts w/ positive velocity, slows down + reaches 0, speeds up to opposite of initial velocity
-ball thrown down: starts w/ negative velocity,

Question 18

what does a horizontal line on position time graph mean?

Answer 18

standing still

Question 19

What does straight diagonal line on position time graph mean?

Answer 19

constant velocity

Question 20

what does a curved line on position time graph mean?

Answer 20

acceleration

Question 21

what does a horizontal line on velocity-time graph mean?

Answer 21

constant velocity

Question 22

what does a straight diagonal line on a velocity-time graph mean?

Answer 22

accelerating