Find the object's speeds v1, v2, and v3 at times t1=2.0s, t2=4.0s, and t3=13s.

Question

nottim · Answer

http://session.masteringphysics.com/problemAsset/1029069/22/1029069.jpg

nottim · Answer

Before flinging about "You fool, just use v=d/t", I already tried that.

anonymous · Answer

Wouldn't that just be?
2m/s
(7/4)m/s
(9/13)m/s

anonymous · Answer

At 4s, there is no change in distance with time, so the speed is 0. Aren't the others just (change in x) / (change in time), too? What exactly did you try?

lastdaywork · Answer

@NotTim 
Use v=d/t for a single straight line (containing the concerned point)

nottim · Answer

Ok, so here's the answers that I put, but were considered wrong: "2.5, 1.75, 0.69" and "2.25, 1.75, 0.69" and "2.3, 1.8, 0.69"

lastdaywork · Answer

^^ Please provide solution

lastdaywork · Answer

I mean your working not just the answers (So that I can tell where are you making a mistake)

nottim · Answer

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