A 2.00-kg object has a velocity (5.60 î - 1.40 ĵ) m/s. (Note: From the definition of the dot product, v2 = v · v.) (a) What is its kinetic energy at this moment?  J (b) Find the net work done on the object if its velocity changes to (8.00 î+ 4.00 ĵ) m/

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Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A 2.00-kg object has a velocity (5.60 î - 1.40 ĵ) m/s. (Note: From the definition of the dot product, v2 = v · v.)

(a) What is its kinetic energy at this moment?
 J

(b) Find the net work done on the object if its velocity changes to (8.00 î+ 4.00 ĵ) m/s.
 J
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