1. The problem statement, all variables and given/known data Three particles move along the x-axis, each starting with v= 10m/s at t_0 = 0s. The graph for A is a position-versus-time graph; the graph for B is a velocity-versus-time graph; the graph for C is an acceleration-versus-time graph. Find each particle's velocity at t = 7.0s. Work with the geometry of the graphs, not with kinematic equations. http://img27.imageshack.us/img27/5497/phys.jpg [Broken] 2. Relevant equations A=1/2(b)(h) A=bh 3. The attempt at a solution Particle A: A=1/2(5)(50) =125m/7s =-17.85m/s, negative because the particle is moving leftwards. Particle B: Since this is a Velocity vs. Time graph, the Velocity axis shows the object to be moving at 20m/s. Particle C: At t=2s, the car stops(?) and begins to accelerate till t=8s. At t=7s, would the acceleration be 50m/s^2? Can anyone check if I'm doing these correctly at all, and if not can you advise me, please?