Question

A school bus drives north and then east through the city as it takes students to school. The bus crosses a city block every 10 seconds. If all the city blocks are the same length, what can be said about the motion of the bus?

A.
The bus is decelerating at a constant rate.

B.
The bus is accelerating at a constant rate.

C.
The bus is moving at a constant speed.

D.
The bus is moving at a constant velocity.

Answer 1

C. The bus is moving at a constant speed.

Reason: it covers equal distances (equal city-block lengths) in equal times (10 s each), so its speed is constant. Its velocity is not constant because the direction changes (north to east), and there is no reason to conclude a constant acceleration.