Question

1. an old car with a leaky engine leaves the following oil drop trace on the street. the car is moving to the right.

which statement describes how the car was moving?
a. the car was at rest for several seconds. then, it moved at a constant leftward velocity.
b. the car moved in a rightward direction with a leftward acceleration.
c. the car slowed down from a high velocity to a rest position and remained at rest.
d. the car moved at a constant rightward velocity. then, it slowed down to a rest position and remained rest.

Explanation:

1. Oil drop spacing shows speed: wider spacing = higher speed, narrower = lower speed.
2. The car moves right: first, drops are evenly spaced (constant rightward speed).
3. Then drops get closer together (slowing down), then stops (final clustered drops, no new movement).
4. Match this to the options: option d aligns with this sequence.

Answer:

d. The car moved at a constant rightward velocity. Then, it slowed down to a rest position and remained rest.