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An object travels North at # 3 m/s# for #6 s# and then travels South at # 2 m/s# for # 4 s#. What are the object's average speed and velocity?

Answer 1

Charlotte Aaron

The average speed is #=2.6ms^-1#
The average velocity is #=1ms^-1#

The total distance travelled is #d=3*6+2*4=26m#

The total time is #t=6+4=10s#

The typical pace is

#barv=d/t=26/10=2.6ms^-1#

The change in location is

#Deltax=3*6-2*4=10m#

The mean speed is

#=(Deltax)/t=10/10=1ms^-1#

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Answer 2

Axel Acevedo

The object's average speed is ( \frac{{3 \text{ m/s} + 2 \text{ m/s}}}{2} = 2.5 \text{ m/s} ). Its average velocity is 0 m/s because it returns to its original position.

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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.