1- if an equation of motion given by ( X=2t , Y=2t+4 ) prove that the motion is Straight.
2- if the position of object given by ( X=3t-4t2+t3 )
a- give the position at ( t=1),( t=2 ),( t=3 ),( t=4 )
b- find the displacement between ( t1 = 0 and t2 = 4 )
c- find the average velocity between ( t1 = 2 and t2 = 4 )
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