ALL EQUATIONS Flashcards

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1
Q

what is the equation for density

A

density= mass/ time

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2
Q

what is the equation for speed

A

speed= distance/ time

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3
Q

what is the equation for acceleration

A

acceleration= speed or velocity/ time

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4
Q

what is the equation for force

A

force (N)= mass (kg) x acceleration (m/s/s)

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5
Q

what is the equation for weight

A

weight (N)= mass (kg) x gravitational field strength (m/s/s) or (N/kg)

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6
Q

what is the equation for momentum

A

momentum (kg m/s)= mass (kg) x velocity (m/s)

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7
Q

what is the equation for resultant force

A

resultant force= change in momentum/ change in time

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8
Q

what is the equation for impulse

A

impulse= force x time

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9
Q

what is the equation for moment

A

moment (Nm)= Force(N) x distance (m)

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10
Q

what is the equation for spring constant

A

spring constant = load/ extension

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11
Q

what is the equation for pressure

A

pressure (N/m2)= force (N)/ area (m2)

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12
Q

what is the equation for pressure in liquids

A

pressure in liquids= density x gravity x depth

p=pgh

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13
Q

what is the equation for air pressure

A

P1 x V1 = P2 x V2

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14
Q

what is the equation for work

A

work (J) = force (N) x distance (m)

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15
Q

what is the equation for gravitational potential energy

A

gravitational potential energy= mass x gravity x height

GPE=mgh

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16
Q

what is the equation for kinetic energy

A

kinetic energy = 1/2 mass x velocity2

KE=1/2mv2

17
Q

what is the equation for efficiency

A

efficiency= useful work done/ total energy impute

18
Q

what is the equation for power

A

power= work done or energy transferred/ time taken

19
Q

what is the equation for useful work impute

A

force x speed

20
Q

what is the equation for energy transferred

A

energy transferred (J) = mass (kg) x specific heat capacity (J/ C or K) x temperature change (Δ C or K)

or

energy transferred (J) = voltage (V) x time (s) x current (A)

or

energy transferred= mass x latent heat (fusion or vapor)

21
Q

what is the equation for speed in a wave diagram

A

speed= frequency x wavelength

V=f x λ

22
Q

what is the equation for the speed of normal sound and the speed of an echo

A

normal:
speed= distance travelled/ time taken

echo:
speed= distance x2/ time