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HomePhysicsA particle which is constrained to move along the x-axis, is subjected to a force in the same direction which varies with the distance x of the particle from the origin as  F(x)= -kx+ax3 . Here k and a are positive constants. For  x ≥ 0 , the functional from of the potential energy U(x)  of the particle is

A particle which is constrained to move along the x-axis, is subjected to a force in the same direction which varies with the distance x of the particle from the origin as  F(x)= -kx+ax3 . Here k and a are positive constants. For  x ≥ 0 , the functional from of the potential energy U(x)  of the particle is

Answer:d

 

(17)

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12. An ideal gas is taken through the cycle A→ B → C → A, as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process C → A is

(a)      – 5 J (b)  – 10 J (c)   – 15 J (d)  – 20 J Answer-a (126)

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