Studied by 7 people
time period of an experiment
average/no of oscillations
weight
mass x gravity
speed
distance/time
velocity
displacement/time
acceleration
(final velocity - initial velocity)/time
distance/time graphs
gradient = speed
speed/time graphs
area = distance gradient = acceleration
momentum
mass x velocity
change in momentum
mass x (initial - final velocity)
resultant force
change in momentum/time or mass x acceleration
conservation of momentum
momentum before and after the collision is the same or m1u1 + m2u2 = m1v1 + m2v2
impulse
change in momentum or force x time
moment
force x perpendicular distance from pivot
pressure
force/area calculate weight for force
pressure of a gas
p1v1 = p2v2 if temperature is constant
pressure in liquids
density x gravity x height
total pressure
liquid pressure + atmospheric pressure
atmospheric pressure
1 x 10^5 pa
work
force x displacement or energy transferred
work done by gravity
weight x height
kinetic energy
(mass x velocity^2)/2
gravitational potential energy
gravity x mass x height
power
work/time or energy/time or force x speed rate at which energy is converted
efficiency
useful output/input x100 (if asked) or useful work done / total energy output
