9. Work & Energy
Intro to Calculating Work
12:11 minutes
Problem 7.24a
Textbook Question
Textbook Question(II) A constant force F→ = (2.0 î + 4.0 ĵ) N acts on an object as it moves along a straight-line path. If the object’s displacement is d→ = (1.0 î + 5.0 ĵ) m, calculate the work done by using these alternate ways of writing the dot product:
(a) W = Fd cosθ ; (b) W = Fₓdₓ + Fᵧdᵧ .
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