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24 Cards in this Set

  • Front
  • Back

Weight

Weight= mass X gravitational field strength



W=mg

Work done

Work done=force X distance



W= Fs

Force applied to a spring

Force applied to a string=


spring constant X extension



F= ke

Distance

Distance=speed X time


s= vt

Acceleration

Change in velocity


—————————-


Time


a= /\v


——


t

Resultant force

Mass X acceleration



F= ma

Momentum

Mass X velocity



p= mv

Kinetic energy

1/2 X mass X speed*

Gravitational potential energy

Mass X gravitational field strength X height



Ep= m X 9.8 X h

Power

Energy transferred


—————————-


Time



P= E



t

Power

Energy transferred


—————————-


Time



P= E



t

Power

Work done


—————-


Time



P= W


—-


t

Efficiency

Useful output transfer


————————————-


Total input energy transfer

Efficiency

Useful output transfer


— — — — — — — — — — — — -


Total input energy transfer

Efficiency

Useful power output


——————————


Total power input

Charge flow

Q= It



Current X time

Potential difference

Current X resistance



V=IR

Potential difference

Current X resistance



V=IR

Power

Potential difference X current



P=VI

Power

(current)* X resistance



P=I*R

Energy transferred

Power X time



E= Pt

Energy transferred

Charge flow X p.d



E= QV

Energy transferred

Charge flow X p.d



E= QV

Density

p= m


—-


V



Mass


———-


Volume