Question

A box of mass m is pressed against (but is not attached to) an ideal spring of force constant and eventually stops. Find the k and negligible mass, compressing the spring a distance x. After it is released, the box slides up a frictionless incline as shown in the figure maximum height h the box can reach in terms of m, k g and x? A) 2mgkx^2 B) 2 mg/2kx^2 C) kx^2/2 mg D) gkx^2/2m The potential energy (in SI units) for a certain mass moving in one dimension is given by U(x) = 2 x^2 + 16 x - 23. Find the location, x, where the force on the mass is zero. A) 2.0 m B) -5.0 m C) 5.0 m D) -4.0 m E) -2.0 m A shell explodes into two fragments, one fragment is 4 times heavier than the other. The velocity of the heavier fragment should be A) Two times greater than the velocity of the lighter fragment. B) Two times smaller than the velocity of the lighter fragment. C) Four times greater than the velocity of the lighter fragment. D) Four times smaller than the velocity of the lighter fragment. E) The same as the velocity of the lighter fragment.

Answer 1

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