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A particle experiences a variable force ) j ˆ y 3 i ˆ x 4 ( F 2 + = G in a horizontal x-y plane. Assume distance in meters and force is newton. If the particle moves from point (1, 2) to point (2, 3) in the x-y plane; then Kinetic Energy changes by

1. 50.0 J
2. 12.5 J
3. 25.0 J
4. 0 J

Correct answer: 25.0 J

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