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AP_Physics_B_-_Work_and_Energy

# AP_Physics_B_-_Work_and_Energy - Work,Energy&Power AP...

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Work, Energy & Power AP Physics B

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There are many different TYPES of  Energy. Energy is expressed in JOULES (J) 4.19 J = 1 calorie Energy can be expressed more specifically by using the term WORK(W) Work = The Scalar Dot Product between Force and Displacement. So that means if you apply a force on an object and it covers a displacement you have supplied ENERGY or done WORK on that object.
Scalar Dot Product? A product is obviously a result of multiplying 2 numbers. A scalar is a quantity with NO DIRECTION. So basically Work is found by multiplying the Force times the displacement and result is ENERGY, which has no direction associated with it. θ cos x F x F W = A dot product is basically a CONSTRAINT on the formula. In this case it means that F and x MUST be parallel. To ensure that they are parallel we add the cosine on the end.

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Work The VERTICAL component of the force DOES NOT cause the block to move the right. The energy imparted to the box is evident by its motion to the right. Therefore
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