equation for speed Flashcards
distance/time (26 cards)
Equation for force
Force = mass * acceleration
(Average) speed equation
Distance (moved) / time (taken)
Acceleration equation
Change in velocity / time taken
Final velocity equation
Final velocity^2 = initial velocity^2 + 2(acceleration x displacement)
Weight equation
weight = mass x gravitational field strength
Stopping distance equation -_-
Stopping distance = thinking distance + braking distance
Force equation (momentum)
Change in momentum (kg m/s) / time (s)
Moment equation
Moment (Nm) = Force (N) x perpendicular distance (m)
Voltage equation
Voltage (V) = current (I) x resistance (R)
Charge
Charge (C) = Current (I) x Time (t)
What
Is charge measured in
Coulomb
Energy transferred
Energy transferred = charge x voltage
Energy transferred (2)
Energy transferred = charge x current x resistance
Electrical power = current x voltage
Wave speed equation
Wave speed = frequency (hz) x wavelength
Critical angle
Sin c = 1/n (n is the refractive index)
Refractive index (n) = speed of light in a vacuum (c) / speed of light in that material (v)
Refractive index (snells law) = sin i/ sin r
Efficiency equation
(Useful energy output / total energy output ) x 100%
Work done = force x distance moved
Energy in kinetic energy store
1/2 x mass x (speed)^2
Density equation
Density = Mass / volume
Pressure equation
force / area
Pressure difference equation
Height x density x gravitational field strength
