Question

1. which of the following best describes the velocity of an object?

a. 60 m upwards
b. 120 m/s left
c. 225 m/s²
d. 210 m/s

Explanation:

Velocity is a vector quantity, meaning it has both magnitude (speed) and direction. Let's analyze each option:

• Option A: "60 m upwards" describes displacement (a vector with distance and direction), not velocity (which has units of speed, like m/s, plus direction).
• Option B: "120 m/s left" has a speed unit (m/s) and a direction (left), so it correctly represents velocity.
• Option C: "225 m/s²" is the unit for acceleration (rate of change of velocity), not velocity.
• Option D: "210 m/s" is speed (a scalar, only magnitude, no direction), not velocity.

Answer:

B. 120 m/s left