We know that the 2-D ballistics motion curve for an object launched from initial position (x,,yo) with launch angle a and initial speed v, is represented by: F(t)= (v,cosa)t + x,- gr + (v, sinæ)t + y, ). We also know that this motion represents a 2 body whose acceleration only incorporates gravity. Lets assume we launch from (0,0) and that the ground is completely flat to keep it simple. Using the launch angle a= 30' and an initial speed of A×10 m/sec. A=7 a. Find the parametric equations for the tangent line to the object 2 seconds after launch. b. Find the tangential component vector of acceleration ä,(t) at that given time and the acceleration vector at that time. Then use those two to find the normal component vector of acceleration ā, (1) . In other words use ā(t)=ā, (t)+ā, (t)- c. Find the angles the tangential and normal components make with the acceleration vector. с. What must the two angles add to?

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