please solve step by step for Q7-8-9-10-11 6. /3 points SerPSE9 3.P.020 A girl d

Question

please solve step by step for Q7-8-9-10-11

6. /3 points SerPSE9 3.P.020 A girl delivering newspapers covers her route by traveling 5.00 blocks west, 3.00 blocks north, and then 8.00 blocks east (a) What is her resultant displacement? blocks at ° north of east (b) What is the total distance she travels? blocks Need Help? Read It -2 points SerPsE93 P028. A snow-covered ski slope makes an angle of 6slope 39.0° with the horizontal. When a ski jumper plummets onto the hill, a parc 21.0° from the vertical in the uphill direction as shown in the figure below. snow slopc (a) Find the component of its maximum displacement parallel to the surface. (b) Find the component of its maximum displacement perpendicular to the surface.

Explanation / Answer

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10 ans

Given that

A=-8i+16j

B=12.8i-6.8j

now we find the vector C=(A-B)/3

vector C=(-8i+16j)-(12.8i-6.8j)/3

=-20.8i+22.8j/3

=-6.9i+7.6j

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11 ans

Given that

vector A=5i-j+5k

vector B=9i+9j-2k

now we find the vector C=A+B

vector C=A+B=(5+9)i+(-1+9)j+(5-2)k=14i+8j+3k

now we find the vector D=2A-B

vector D=2(5i-j+5k)-(9i+9j-2k)

=(10-9)i+(-2-9)j+(10+2)k=i-11j+12j

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