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The potential energy of a particle of ma...

The potential energy of a particle of mass 5 kg moving in the x-y plane is given by `U=-7x+24y` joule, x and y being in metre. Initially at t = 0 the particle is at the origin. (0, 0) moving with a velocity of `6[2.4hat(i)+0.7hat(j)]m//s`. The magnitude of force on the particle is :

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