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Willem 's Gravesande Experiment
Émilie du Châtelet
Translates and creates a commentary on Newton's Principia
Helps to develop Conservation of Energy (KE)
KE,V have a ....
Direct Square Relationship
Equation
KE = (½)mv^{2} 
Relationships
KE/m
Direct
KE = (½)mv^{2} 
KE/v?
Direct Square
Ex 1) A 60.0kg runner has 1920 joules of kinetic energy. What is her speed? 
Ex) A 60.0kg runner has 1920 joules of kinetic energy.
What is her speed ?
KE = (½)mv^{2} 
m = 60.0 kg
KE = 1920 J
V = ?
1920 J=(1/2)60.0kgV^{2}
1920 J = 30V^{2}
64.0 = V^{2}
V = 8.00 m/s
Summary W, K E, PE


Then ...
ΔPE = 40 J
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