Question

As shown in the figure below, Justin walks from the house to his truck on a windy day. He walks 20 m toward

Answer 1

Complete Question

The complete question is shown on the first uploaded image

Answer:

The velocity is   $v =0.333 \ m/s$ in positive x -direction

The speed is $s = 0.733 \ m/s$

Explanation:

From the question we are told that

The distance from the house to truck is  D =  20 m

  The distance traveled back to retrieve  wind-blown hat is  d =  15

  The distance from the wind-blown hat position too the truck is  k =  20  m

  The total time taken is  t  =  75 s

Generally when calculating the displacement the Justin's backward movement to collect his wind - blown hat is taken as negative

Generally Justin's displacement is mathematically represented as

      $L = 20 - 15 + 20$

=>    $L = 25 \ m$

Generally the average velocity is mathematically represented as

          $v = \frac{L}{t}$

=>      $v = \frac{25}{75}$

=>      $v =0.333 \ m/s$

Generally the distance covered by Justin is mathematically represented as  

         $R = D+ d + k$

=>      $R = 20 + 15 +20$

=>     $R = 55 \ m$

Generally Justin's average speed over a 75 s period is mathematically represented as

            $s = \frac{R}{ t}$

=>         $s = \frac{55}{ 75}$

=>        $s = 0.733 \ m/s$