Question

1. liam watched the fire engine race down the street with its sirens blaring. as it turned north, the fire engine slowed slightly to make the turn. how did the turn affect the motion of the fire engine?

clear all
the turn did not affect either the speed or the velocity of the fire engine.
the turn only changed the velocity of the fire engine.
the turn only changed the speed of the fire engine.
the turn changed the speed and velocity of the fire engine.

Explanation:

Velocity is a vector quantity that has both magnitude (speed) and direction. When the fire - engine turns north, its direction changes. Since velocity depends on direction, the velocity of the fire - engine changes. Also, the problem states that the fire - engine slowed slightly to make the turn, so its speed (magnitude of velocity) also changed.

Answer:

The turn changed the speed and velocity of the fire engine.