Question

Bruce is moving on a linear path from A to B and then from B to C as shown in the figure. Find his average speed.

• A. 1 m/s
• B. 2 m/s
• C. 3 m/s
• D. 4 m/s

Answer 1

The correct option is B 2 m/s

• The total distance travelled from A to B to C is AB + BC = 300 + 100 = 400 m
• The total time taken in the journey is 2 m 30 s + 50 s = 3 m 20 s or 200 s

Average speed:
$v_{av}=\frac{\text{Total distance}}{\text{Total time taken}}$
$v_{av}=\frac{400}{200}=2m/s$