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1- if an equation of motion given by ( X=2t , Y=2t+4 ) prove that the...

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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