Equations Flashcards
What equation relates speed, distance and time?
speed = distance/time
What equation is correct for the pressure due to a column of liquid?
pressure = density x gravity x height of column
Which is the correct equation relating force, spring constant and extension?
force = extension/spring constant
What is the correct equation for power?
power = (current)^2 x resistance
What is the correct unit for power?
Watts (W)
What is the correct unit for time?
seconds (s)
What is the correct unit for acceleration?
metres per second squared (m/s^2)
What is the equation for Weight
weight = mass × gravitational field strength
What is the equation for work done
work done = force × distance (along the line of action of the force)
What is the equation for force appiled to a spring
force applied to a spring = spring constant × extension
What is the equation for distance travelled
distance travelled = speed × time
What is the equation for acceleration
acceleration =change in velocity/
time taken
What is the equation for resultant force
resultant force = mass × acceleration
What is the equation for momentum
momentum = mass × velocity
What is the equation for kinetic energy
kinetic energy = 0.5 × mass × (velocity)^2
What is the equation for gravitational potential energy
gravitational potential energy = mass × gravitational field strength × height
What is the equation for power
using resistance
power = (current)^2 × resistance
What is the equation for power
using potenial diffenernce
power = potential difference × current
What is the equation for charge flow
charge flow = current × time
What is the equation for power
using work done
power =
work done/ time
What is the equation for efficency
general
efficiency = useful/ total
What is the equation for energy transfered
using charge flow
energy transferred = charge flow × potential difference
What is the equation for energy transfered
using power
energy transferred = power × time
