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Physics > Equations and units > Flashcards

Equations and units Flashcards

1
Q

What is the formula relating charge, current and time

A

Q=I x T

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2
Q

What is the formula relating energy, power and time

A

E=P x T

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3
Q

What is the formula relating power, current and potential difference

A

P=I x V

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4
Q

What is the formula relating weight, mass and gravitational field strength

A

W=m x g

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5
Q

What is the formula for kinetic energy

A

The formula for kinetic energy is 0.5 x mass x speed²

=0.5 x m x v²

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6
Q

What is the formula relating power, current and resistance

A

P= I² x R

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7
Q

What is the formula relating density, mass and volume

A

D=m/v

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8
Q

What is the formula that links voltage, current and resistance

A

V= I x R

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9
Q

What unit do we measure power in?

A

Watts (W)

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10
Q

What is the formula for efficiency?

A

Useful energy/Total energy

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11
Q

What is the formula for gravitational potential energy?

A

P.E=m x g x h

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12
Q

What is the formula that links energy, charge flow and potential difference?

A

E=Q x V

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13
Q

What unit do we measure charge in?

A

Coulombs (Q)

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14
Q

What is the formula for work done?

A

Force x distance done

WD= F x d

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15
Q

What is the formula that links force, mass and acceleration

A

F=m x a

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16
Q

What is the formula for momentum?

A

Momentum(p)=m x v

17
Q

What is the unit of momentum

A

Kg m/s

18
Q

What is the formula for wave speed?

A

Wave speed=wavelength x frequency

19
Q

What is the formula that links acceleration, change in speed and time

A

Acceleration=(final velocity- initial velocity) / time

a=(v-u)/t

20
Q

What is the formula that links force, spring constant and extension

A

F=k x e

F (N)=k (N/m) x e (m)

21
Q

What is the formula relating speed, distance and time

A

Speed=distance/time

Physics (5 decks)

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