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What is the speed of an object that travels from #( -2,1,2) # to #( -3, 0,-7 ) # over #3 s#?

Answer 1

Layla Ahmed

The speed of the object #="distance"/"time"=3.037 " units/s"#

So take #vecA=<-2,1,2>, vecB=<-3,0,-7>#

#vec(A-B)=<-1,1,9># #|A-B|=sqrt(-1^2+1^2+9^2)# #|A-B|=sqrt(83)=9.110# #"distance"=9.110#

The speed of the object #="distance"/"time"# #=9.110/3=3.037 " units/s"#

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Answer 2

Xavier Adame

To find the speed, calculate the distance traveled and divide by the time taken. Speed = Distance / Time. The distance is the magnitude of the displacement vector between the two points. Speed = 9 units per second.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.