formulae Flashcards

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1
Q

u

A

inital velocity

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2
Q

v

A

final velocity

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3
Q

t

A

time

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4
Q

a

A

acceleration

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5
Q

s

A

displacement

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6
Q

Speed

A

Distance/time

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7
Q

Average speed

A

Total distance/ total time

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8
Q

Velocity

A

Displacement/ time

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9
Q

Displacement

A

Distance with direction

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10
Q

Acceleration

A

change in velocity/ change in time

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11
Q

How do you find the speed in a distance time graph

A

Find gradient

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12
Q

Free fall

A

9.82ms^-1

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13
Q

Weight

A

Mass x gravity

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14
Q

Define weight

A

Weight is the effect of a gravitational field on a mass

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15
Q

Density

A

Mass/volume

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16
Q

newtons 1st law

A

Objects will remain at rest, or move with a constant velocity unless acted on by a resultant force

17
Q

newtons 2nd law

A

F = ma

18
Q

What does the decreasing trend in extension graph mean

A

The spring has reached its elastic limit

19
Q

Hooke’s law

A

Force = Spring constant x extension
F=kx

20
Q

Moment

A

Moment = force x perpendicular distance to pivot
m=df

21
Q

Momentum

A

Mass x velocity
p=mv

22
Q

Conservation of Momentum

A

The total momentum before a collision = The total momentum after a collision

23
Q

Impluse

A

impulse = force × change in time
impulse = FΔt

Δp = mv − mu
m = mass in kg
v = final velocity in m/s
u = initial velocity in m/s