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The Work Done by the Force F(x,y)=(x+y)i(yx)j\mathbf { F } ( x , y ) = - ( x + y ) \mathbf { i } - ( y - x ) \mathbf { j }

Question 86

Multiple Choice

The work done by the force F(x,y) =(x+y) i(yx) j\mathbf { F } ( x , y ) = - ( x + y ) \mathbf { i } - ( y - x ) \mathbf { j } moving along r(t) =t3i+t2j\mathbf { r } ( t ) = t ^ { 3 } \mathbf { i } + t ^ { 2 } \mathbf { j } from (8, 4) to (1, 1) is


A) 1765\frac { 176 } { 5 }
B) 1865\frac { 186 } { 5 }
C) 1965\frac { 196 } { 5 }
D) 2215\frac { 221 } { 5 }
E) 2265\frac { 226 } { 5 }

Correct Answer:

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