Question

A family took a trip in a car traveling East from Greensboro to Wilmington, NC. Use the Graph to answer the questions below.

Answer 1

Answer:

1). Average speed = 1.5 m per second

2). Average velocity = 1.5 m per second

Explanation:

1). Since, speed is a scalar quantity

   Therefore, average speed of the trip = $\frac{\text{Total distance covered}}{\text{Total time taken}}$

    From the graph attached,

   Total distance covered = 10 + 10 + 20 + 0 + 20 + 30

                                           = 90 meters

   Total time taken = 60 seconds

    Average speed = $\frac{90}{60}$

                               = 1.5 meter per second

2). Velocity is a vector quantity.

    Therefore, average velocity = $\frac{\triangle d}{\triangle t}$

                                                   = $\frac{d_{60}-d_0}{60-0}$

                                                   = $\frac{90-0}{60-0}$

                                                   = 1.5 meter per second