الله يجزاك الجنه ويوفقك يآآآآآآآآآآآآآآآآآآآآآآآآآآرب
عندي اسئله 
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1) the x component of vector A is -25.0 m and the y component is + 40.0 m
(a) what is the magnitude vector A ?
(b) what is the angle between the direction of vector A and the positive direction of x ?
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3) what are (a) the x component and (b) the y component of a vector a in the xy plane if its direction is 250 counterclock wise from the positive direction of the x axis and magnitude is 7.3 m?
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6)a displacement vetor r in the xy plane is 15 m long and directed at angle ∂=30 in fig 3-29.determine (a) the x component and (b) the y component of the vector.
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13 ) two vectors are given by
a= (4.0m)i - (3.0m)j = (1.0m)k
b= (-1.0m)i - (1.0m)j = (4.0m)k
in unit-vector notation , find (a) a+b,(b) a - b and (c) a third vector c such that
a - b + c=0
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17) the two vector a and b in fig 3-30 have equal magnitudes of 10.0 m and the angles are ∂1=30 and ∂2=105.
find the (a) x and (b) y components of their vector sum r , (c) the magnitude of r, and (d) the angle r make with the positive direction of the x axis
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