Equations YNTK

Question 1

What is the equation for weight?

Answer 1

Mass (Kg)x Gravitational Field Strength (N/kg). W=m x g

Question 2

What is the equation for work done (joules)?

Answer 2

Force (N) x Distance (m)

Question 3

What is the equation for force (N) applied to a spring?

Answer 3

Spring constant (N/m) x Extension (m)

Question 4

What is the equation for moment of force (Nm)?

Answer 4

Force (N)x distance (m)

Question 5

What is the equation for pressure (N/m)?

Answer 5

Force normal to a surface (N)
_____________________
Area of that surface (m^2)

Question 6

What is the equation for distance travelled (m)?

Answer 6

Speed (m/s)x Time (s)

Question 7

What is the equation for acceleration (m/s^2) ?

Answer 7

Change in velocity (m/s)
________________
Time taken (s)

Question 8

What is the equation for resultant force (N)?

Answer 8

Mass (kg) x Acceleration (m/s^2)

Question 9

What is the equation for momentum (kgm/s)?

Answer 9

Mass (kg)x Velocity (m/s)

Question 10

What is the equatiom for kinetic energy (joules)?

Answer 10

0.5x Mass (kg)x (Speed)^2 (m/s^2)

Question 11

What is the equation for gravitational potential energy (joules)?

Answer 11

Mass (kg)x Gravitational Field Strength (N/kg) x Height (m)

Question 12

What is the equation for power(watts)?

Answer 12

Time (s)

Question 13

What is the other equation for power (watts)?

Answer 13

Time (seconds)

Question 14

What is the equation for efficieny?

Answer 14

Total input energy transfer (j)

Question 15

What is the other equation for efficiency?

Answer 15

Total power output (j)

Question 16

What is the equation for Wave Speed (m/s)?

Answer 16

Frequency (hertz) x Wavelength (m)

Question 17

What is the equation for charge flow (coulombs)?

Answer 17

Current (amps) x Time (s)

Question 18

What is the equation for potential difference (volts)?

Answer 18

Current (amps)x Resistance (ohms)

Question 19

What is the (electricity) equation for Power (watts)?

Answer 19

Potential Difference (volts)x Current (amps)

Question 20

What is the other (electricity) equation for Power (watts)?

Answer 20

(Current)^2 (amps)x Resistance (ohms)

Question 21

What is the equation for energy tranferred (joules)?

Answer 21

Power (watts)x Time (s)

Question 22

What is the (electricity) equation for energy tranferred (joules)?

Answer 22

Charge Flow (coulombs) x Potential Difference (volts)

Question 23

What is the equation for Density (kg/m^3)?

Answer 23

Volume (m^3)

Question 24

What is gravitational field strength on Earth?

Answer 24

10 N/kg

Question 25

What is the equation for elastic potential energy (joules)?

Answer 25

1/2 x spring constant (N/m) x extension ^2

Question 26

What is the equation for change in thermal energy (joules)?

Answer 26

Mass (kg) x specific heat capacity (J/kg C) x temperature change (C)

Question 27

Equation in uniform/constant acceleration?

Answer 27

Final velocity (m/s) - initial acceleration (m/s)=2 x acceleration (m/s^2) x distance (m)

Question 28

What is Newton’s third law?

Answer 28

When two objects interact, the forces they exert on each other are equal and opposite.

Question 29

What is the equation for stopping distance?

Answer 29

Thinking distance + breaking distance

Question 30

What is the equation for the period(s) of a wave?

Answer 30

Frequency(hertz)(Hz)

Question 31

What is the equation for force(N) (motor effect topic)?

Answer 31

Magnetic flux density (Tesla) x Current (amps) x length (m)

Question 32

What is the equation for magnification?

Answer 32

Magnification = image size/real size (both should be in same units)

Question 33

What is 5000 nanometres in mm?

Answer 33

5mm

Question 34

What is the equation for energy transferred?

Answer 34

Mass x specific heat capacity x change in thermal temperature

Question 35

What is the equation for specific heat capacity?

Answer 35

Change in temp x mass

Question 36

Equation for average speed and velocity?

Answer 36

Total distance

Total time