Chapter 9 Flashcards

1
Q

no change in displacement over time

A

the object is stationary

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2
Q

displacement increases at a constant rate over time

A

the object is moving with constant velocity

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3
Q

displacement is increasing at a greater rate as time increases

A

the velocity is increasing and the object is accelerating

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4
Q

velocity on a displacement time graph

A

gradient represents velocity

if it is a straight line, velocity is constant

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5
Q

average velocity

A

displacement from the starting point/time taken

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6
Q

average speed

A

total distance travelled/time taken

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7
Q

velocity is 0

A

the object is stationary

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8
Q

velocity is unchanging

A

the object is moving with constant velocity

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9
Q

velocity is increasing at a constant rate

A

the object is moving with constant acceleration

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10
Q

acceleration on a velocity-time graph

A

the gradient of the line represents the acceleration if the line is straight the acceleration constant. is the rate of change in velocity

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11
Q

distance/displacement on a velocity-time graph

A

the area between the axis and the graph itself. under the graph. velocity x time

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12
Q

suvat

A
displacement 
initial velocity 
final velocity 
acceleration
time
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13
Q

v=

A

u+at

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14
Q

s=

A

0.5(u+v)t
ut+0.5at^2
vt+0.5at^2

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15
Q

v^2=

A

u^2+2as

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16
Q

gravity

A

cause objects to accelerate towards the earth. has a downward acceleration of 9.8 m/s^2

17
Q

Acceleration

A

Is the rate of change of velocity

Gradient represents acceleration on a velocity time graph and if it is a straight line then it is constant

18
Q

Area under a velocity time graph

A

Velocity x time

Represents the distance travelled or displacement