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A varable force, given by the 2- dimensi...

A varable force, given by the 2- dimensional vector`overlineF=(3xx^(2)hati+4 hatj),` acts on a particle. The force is in newton and x is in metre. What is the change in the kinetic energy of the particle as it moves from the point with coordinates (2,3) to (3,0) (The coornates are in metres)

A

`-7J`

B

zero

C

`+7J`

D

`+19J`

Text Solution

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[3]
`W=int_(2)^(3) 3x^(2)dx+int_(3)^(0) 4dy`
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