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To find.... |
....use this formula |
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Speed |
where v is speed in metres per second, s is distance in metres, and t is time in seconds
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Velocity |
where v is velocity in metres per second, d is displacement in metres, and t is time in seconds |
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Acceleration |
where a is acceleration in m/s2, v is change in velocity in metres per second, and t is time in seconds
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Weight |
W = mg
where W is weight, m is mass in kilograms and g is acceleration due to gravity in m/s2
(on Earth, acceleration due to gravity is approximately 9.8 m/s2) |
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Force |
F = ma
where F is force in newtons, m is mass in kilograms, and a is acceleration in m/s2 |
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Work Done |
W = Fs
where W is work in joules, F is force in newtons, and s is the distance over which the force is applied |
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Gravitational Potential Energy |
GPE = mgh where GPE is gravitational potential energy in joules, m is mass in kilograms, g is the acceleration due to gravity in m/s2, and h is height in metres (on Earth, acceleration due to gravity is approximately 9.8 m/s2) |
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Elastic Potential Energy |
EPE =  kx2
where EPE is elastic potential energy in joules, k is the spring constant of the object, and x is the length of extension or compression in metres |
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Power |
P = W
t
where P is power in watts, W is work in joules, and t is time in seconds |
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Mechanical Advantage |
where MA is the mechanical advantage and the load and effort are measured in newtons
or
 where both distances are measured in metres in a first or second class lever
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