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## Homework Statement

A child a rides a carousel at t = 0 and moves in a circle that is 8 m in circumference at a speed of constant modulus of 1m / s. determine:

a) the movement of t = 0s to t = 1s

b) the average speed from t = 0s to t = 3s

c) the average acceleration between 1s and 3s

## Homework Equations

I've got these that i figure work:

v= v

_{x}

**i**+ v

_{y}

**j**

and

movement = Δx

**i**+ Δy

**j**

## The Attempt at a Solution

Given that the correct answers(provided by my textbook) should be

a) (0,900

**i**-0,372

**j**)m

b) (0,300

**i**- 0,724

**j**)m/s

c) (-0,707

**i**) m/s

^{2}

I dont seem to know how to apply the equations above to land these answers... Vectors confuse me. For instance, Δx and Δy represent what ? I'm stuck. HELP!