Answer:
(b) The average speeds are the same, but the average velocities are different.
Explanation:
The average speed is a scalar quantity which is calculated on the total distance travelled. Distance is the length of path traced and the speed is calculated as distance per unit time.
Mathematically:
[tex]v=\frac{d}{t}[/tex]
[tex]v=\frac{(1500+1500)}{2\times 60}\ m.s^{-1}[/tex]
While the velocity is a vector quantity calculated on the displacement and is defined as the rate of displacement.
Mathematically:
[tex]\vec v=\frac{\vec s}{t}[/tex]
[tex]\vec v=\frac{\sqrt{1500^2+1500^2} }{2\times 60}\ m.s^{-1}[/tex]
