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  4. A particle of mass 0.01 kg travels along a space curve with velocity given by 4 hat i +16 hat k m / s. After some time, its velocity becomes 8 hat i +20 hat j m / s due to the action of a conservative force. The work done on the particle during this interval of time is :

Q. A particle of mass travels along a space curve with velocity given by . After some time, its velocity becomes due to the action of a conservative force. The work done on the particle during this interval of time is :

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Solution:

Given mass and initial velocity












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