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 Kinematics and Dynamics Kinematics and Dynamics Physics Help Forum Sep 28th 2009, 10:58 PM #1 Junior Member   Join Date: Sep 2009 Posts: 23 Velocity and Displacement A particle's initial velocity is given by v0x = -1.0m/s and v0y = 3.0m/s; it's acceleration is ax = 0.50m/s2 and ay = -0.90m/s2. (a) Calculate its velocity 2.0s later. (b) Calculate its displacement at that time. vx = v0x + axt ∆x = v0xt + 1/2axt2 ∆y = v0yt + 1/2ayt2 v = -1.0m/s(x hat) + 3.0m/s(y hat) a = 0.5m/s2(x hat) - 0.9m/s2(y hat) Solve for velocity at 2.0s vx = v0x + axt vx = (-1m/s) + (0.5m/s2)(2.0s) vx = 0m/s vy = v0y + ayt vx = (3m/s) + (-0.9m/s2)(2.0s) vx = 1.2m/s v = 0m/s(x hat) + 1.2m/s(y hat) Calculate displacement. ∆x = v0xt + 1/2axt2 ∆x = (-1m/s)(2.0s) + 1/2(0.5m/s2)(2.0s)2 ∆x = -1m ∆y = v0xt + 1/2axt2 ∆y = (3m/s)(2.0s) + 1/2(-0.9m/s2)(2.0s)2 ∆y = 4.2m y = -1.0m(x hat) + 4.2m(y hat)   Sep 29th 2009, 02:04 AM #2 Physics Team   Join Date: Feb 2009 Posts: 1,425 Looks OK to me.  Tags displacement, velocity Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Physics Forum Discussions Thread Thread Starter Forum Replies Last Post davie08 Kinematics and Dynamics 1 Feb 27th 2011 08:18 PM Hellbent Waves and Sound 0 Feb 10th 2010 09:07 PM khumri64 Kinematics and Dynamics 1 Mar 5th 2009 08:18 PM Blodwynne Kinematics and Dynamics 2 Sep 24th 2008 05:08 PM overduex Kinematics and Dynamics 3 Aug 5th 2008 05:37 PM