Question Detail
Question
What is the velocity of the object? (Given a position-time graph with points at (0,0), (4,20), and (8,40))
Correct Answer
Option D is the correct answer.
Detailed Explanation
Velocity is the slope of the position-time graph. From t=0 s to t=4 s, the displacement is from 0 m to 20 m. The slope is (20 m - 0 m) / (4 s - 0 s) = 20/4 = 5 m/s. The line is straight, indicating constant velocity.
Hint
Velocity is calculated as the change in position divided by the change in time (Δx/Δt).