Question

Please help me with my physics homework. It’s about motion on a straight line. I’ll attach the picture with the problem.

Answer 1

10 km/hr

Step-by-step explanation:

The slope of the line of a position-time graph is velocity.

2nd time interval is t = 1.5 to t = 2.5

slope = v = Δx/Δt = (20 - 10) / (2.5 - 1.5) = 10 / 1 = 10 km/hr