Equations P1-P3 Flashcards
Equation for density
Density (kg/m^3) = mass(kg)/volume (m^3)
Formula for distance travelled.
Distance travelled (m) = speed (m/s) * time (s)
Formula for acceleration
Acceleration (m/s^2) = change in velocity (m/s) / time (s)
How to work out speed in distance time graph?
Gradient = change in y/ change in x
How to work out the average speed ?
In a distance time graph?
Total distance travelled / time taken to travel
How to work out acceleration in velocity time graph?
Gradient = change in y/ change in x
What is the formula for kinetic energy?
Kinetic energy (J) = 0.5 * mass (kg) * speed (m/s^2)
What is the formula for force?
Force (N) = mass (kg) * acceleration
What is the formula for work done?
Work done (J) = force (N) * distance (m)
What is the formula for power?
Power (W) = work done (J)/ time (S)
What is the formula for momentum ?
Momentum (kg m/s) = mass (kg) * velocity (m/s)
What is the formula for force?
Using change in momentum
Force (N) = change in momentum (kg m/s) / time (s)
What is the formula for weight?
Weight (gravity force ) = mass (kg) * gravitational field strength
What is the formula for potential energy?
Potential energy (J) = mass (kg) * height (m) * gravitational field strength (N/kg)
What is the formula for force exerted by a spring?
Force exerted by a spring (N) = extension (m) * spring constant (N/m)