Equations

Question 1

Weight Equation ?

Answer 1

Weight (N) = Mass (Kg) x Gravitational Field strength (N/Kg)

Question 2

Work Done Equation ?

Answer 2

Work done ( J) = Force (N) x Distance (M)

Question 3

Force applied to a spring Equation ?

Answer 3

Force applied to a spring (N) = Spring constant (N/M) x Extension (M)

Question 4

Distance travelled Equation ?

Answer 4

Distance travelled (M) = speed (M/S) x time (S)

Question 5

Acceleration Equation

Answer 5

Acceleration (M/s2) = Change in velocity ( M/S)
—————————————
Time taken (S)

2 = squared

Question 6

Resultant Force Equation ?

Answer 6

Resultant Force ( N) = Mass (Kg) x Acceleration (M/s2)

2 = squared

Question 7

Momentum Equation ?

Answer 7

Momentum (Kgm/s) = Mass (Kg) x Velocity (M/s)

Question 8

Kinetic Energy Equation ?

Answer 8

Kinetic Energy ( J )= 0.5 x Mass (Kg) x speed (m/s2)

2 = squared

Question 9

Gravitational potential energy Equation ?

Answer 9

Gravitational potencial energy ( J )= mass (kg) x gravitational field strength (N/Kg) x height ( M)

Question 10

Power equation ( energy transfered) ?

Answer 10

Power ( W ) = energy transfered ( J )
———————————
Time ( S )

Question 11

Power ( Work done) Equation ?

Answer 11

Power (W) = work done ( J )
———————–
Time (S )

Question 12

Efficiency (Energy transfered) equation ?

Answer 12

Efficiency = useful output energy transfer ( J )
———————————————
Total input energy transfer ( J )

Question 13

Efficiency ( power ) equation ?

Answer 13

Efficiency = useful power output ( J )
——————————–
Total power input ( J )

Question 14

Wave speed equation ?

Answer 14

Wave speed (m/s) =frequency ( H ) x wavelength ( M )

Question 15

Charge flow equation ?

Answer 15

Charge flow ( C ) = current ( A ) x time ( S )

Question 16

Potencial difference equation ?

Answer 16

Potencial difference ( V ) = current ( A ) x resistance (ohms )

Question 17

Power equation (potencial difference) ?

Answer 17

Power ( W ) = potencial difference (v) x current ( A )

Question 18

Power (current) equation ?

Answer 18

Power ( W ) = current 2 (A) x Resistance (ohms)

2 = squared

Question 19

Energy transferred equation ( red power ) ?

Answer 19

Energy transferred ( J ) = power ( W ) x time ( s )

Question 20

Energy transferred ( charge flow ) equation ?

Answer 20

Energy transferred ( J ) = charge flow (C ) x potencial differnce ( V )

Question 21

Density equation ?

Answer 21

Density ( kg/m3 )= mass ( Kg )
———-
Volume ( m3 )

3 = cubed