Physics formulas for forces and motion, pressure and energy
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Last updated 5:18 PM on 11/12/24
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24 Terms
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time period of an experiment
average/no of oscillations
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weight
mass x gravity
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speed
distance/time
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velocity
displacement/time
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acceleration
(final velocity - initial velocity)/time
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distance/time graphs
gradient = speed
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speed/time graphs
area = distance gradient = acceleration
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momentum
mass x velocity
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change in momentum
mass x (initial - final velocity)
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resultant force
change in momentum/time or mass x acceleration
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conservation of momentum
momentum before and after the collision is the same or m1u1 + m2u2 = m1v1 + m2v2
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impulse
change in momentum or force x time
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moment
force x perpendicular distance from pivot
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pressure
force/area calculate weight for force
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pressure of a gas
p1v1 = p2v2 if temperature is constant
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pressure in liquids
density x gravity x height
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total pressure
liquid pressure + atmospheric pressure
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atmospheric pressure
1 x 10^5 pa
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work
force x displacement or energy transferred
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work done by gravity
weight x height
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kinetic energy
(mass x velocity^2)/2
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gravitational potential energy
gravity x mass x height
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power
work/time or energy/time or force x speed rate at which energy is converted
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efficiency
useful output/input x100 (if asked) or useful work done / total energy output
