Final answer:
To find the velocity of an object accelerating at 0.5 m/s² for 2 seconds, we multiply the acceleration by the time. The calculation shows a final velocity change of 1.0 m/s, making answer (B) 1.0 m/s correct.
Step-by-step explanation:
The velocity of an object that accelerates at 0.5 m/s² for 2 seconds can be obtained by using the formula for acceleration, which states that acceleration (a) equals the change in velocity (Δv) divided by the time (t). Therefore, Δv = a × t. By plugging the values into the formula, Δv = 0.5 m/s² × 2 s, which results in a final velocity change of 1.0 m/s. Thus, if the object started from rest, its final velocity after 2 seconds would be 1.0 m/s. If the initial velocity was not zero, this value would be added to the initial velocity to find the final velocity. The correct answer to the student's question is (B) 1.0 m/s.