Question

question 2 (3 points) (01.10 mc) the speedometer of a car moving to the north reads 50 mph. at an intersection, another car crosses in front of it, traveling at 50 mph. which statement is the most accurate description of the motion of the vehicles?
○ a the vehicles are moving at the same velocity.
○ b the vehicles are moving in the same direction.
○ c the vehicles are moving at different velocities.
○ d the vehicles are moving at different rates.

Explanation:

Velocity is a vector quantity (includes speed and direction), while speed is a scalar (only magnitude). The first car moves north at 50 mph, the second car crosses in front (so different direction, likely east/west) at 50 mph.

• Option a: Velocity differs (different directions), so incorrect.
• Option b: Directions are different (north vs. crossing front, e.g., east/west), so incorrect.
• Option c: Velocity depends on speed and direction. Since directions differ, velocities are different (same speed, different direction), so this is correct.
• Option d: Both have speed 50 mph, so same rate, incorrect.

Answer:

c. The vehicles are moving at different velocities.