1.4 Linear Motion

Question 1

Displacement

Answer 1

Vector
Describes how far an object is from where it started

Question 2

Distance

Answer 2

Scalar
Describes overall how object has moved

Question 3

Speed

Answer 3

Rate of change of distance
Scalar

Question 4

Speed equation

Answer 4

Distance/time

Question 5

Acceleration

Answer 5

Rate of change of velocity

Question 6

What does delta triangle stand for?

Answer 6

Change in

Question 7

Acceleration equation

Answer 7

Acceleration = v-u/t

Question 8

Change in velocity

Answer 8

Change in speed and/or direction
Negative of object slowing down

Question 9

Negative acceleration

Answer 9

Retardation/deceleration

Question 10

Average velocity equation

Answer 10

Vav = u+v/2

Question 11

5 equations of motion

Answer 11

V=u+at
S=ut+1/2at2
V2=u2+2as
S=1/2t(u+v)
S=vt-1/2at2

Question 12

Acceleration under gravitational field

Answer 12

G = 9.81 ms-2

Question 13

Object falling down ‘g’ value

Answer 13

Positive - 9.81

Question 14

Object thrown up ‘g’ value

Answer 14

Negative - -9.81

Question 15

Gradient of a displacement time graph

Answer 15

Velocity

Question 16

Y intercept displacement time graph

Answer 16

Initial displacement

Question 17

2 curves coincide displacement-time graph

Answer 17

Same displacement at this time

Question 18

Straight line on displacement/time graphs

Answer 18

Constant velocity

Question 19

Curved line displacement/time graphs

Answer 19

Acceleration

Question 20

Average velocity on displacement/time graphs

Answer 20

Slope of straight line connecting end points of curve

Question 21

Instantaneous velocity on displacement/time graphs

Answer 21

Slope of the line tangent to curve at any point

Question 22

Positive slope on displacement/time graphs

Answer 22

Moving in positive direction

Question 23

Negative slope on displacement/time graphs

Answer 23

Moving in negative direction

Question 24

Zero slope on displacement/time graphs

Answer 24

State of rest

Question 25

Area under curve of displacement/time graphs

Answer 25

Meaningless

Question 26

Slope of velocity/time graphs

Answer 26

Acceleration

Question 27

Y intercept of velocity/time graphs

Answer 27

Initial velocity

Question 28

2 curves coincide velocity/time graph

Answer 28

2 objects same velocity at that time

Question 29

Straight lines on velocity time graphs

Answer 29

Uniform acceleration

Question 30

Curved lines velocity/time graphs

Answer 30

Non-uniform acceleration

Question 31

Instantaneous acceleration velocity/time graphs

Answer 31

Slope of line tangent to curve at any point

Question 32

Positive slope velocity/time graphs

Answer 32

Increase in velocity in positive direction

Question 33

Negative slope

Answer 33

Increase in velocity in negative direction

Question 34

Area under graph of velocity time graphs

Answer 34

Displacement (vxt)

Question 35

Zero slope in velocity/time graphs

Answer 35

Motion with constant velocity

Question 36

How to calculate average velocity using velocity/time graphs

Answer 36

Calculate displacement
Divide by total time taken

Question 37

Apparatus in experiment using light gates and computer software to measure acceleration of free fall,g

Answer 37

Light gate - to start clock
Light gate - to stop clock
Interrupt card

Question 38

Method for using light gates and computer software to measure acceleration of free fall, g

Answer 38

Set up apparatus
Light gates connected to data logging device
Software enables time for an object to pass through first gate, through second gate and between cards to be obtained
Length of card measured using ruler
Hold card at upper light gate so it starts from rest u = 0
Adjust position of lower light gates so it is 2,000cm measured using a metre ruler
Set data logger to record the time taken for card to travel between light gates
Computer should record time