11) A 0.500kg object is rest on the horizontal frictionless surface. It is in th

Question

11) A 0.500kg object is rest on the horizontal frictionless surface. It is in the position such that it compresses the spring a distance 12cm. If the object is released, the object moves from the spring at the speed of 20cm/s. What is the spring constant of the spring?

A) 2.19 N/m

B ) 2.78 N/m

C) 3.17 N/m

D) 0.333 N/m

E) 1.39 N/m

10) A force on an object is given by F(x) = (2.00N/m)x + (-3.00N/m^3)x^3 . What is the potential energy function for this conversation force?

A) (-2.00N/m)x^2 + (3.00N/m^3)x^4

B ) (-2.00N/m) + (-3.00N/m^3)x^2

C) (-1.00N/m)x^2 + (0.750N/m^3)x^4

D) 2.00N/m - 9.00x^2

E) -2.00N/m + 9.00x^2

Explanation / Answer

11) 1/2(K*X2) = 1/2(m*V2)

K= 1.39 N/m

10) C) (-1.00N/m)x^2 + (0.750N/m^3)x^4

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