H5.

3. Four identical objects all are released from rest at a height h from the top of a frictionless ramp, The objects slide down the ramps and reach some final velocity. What below has them ranked from greatest final velocity to least. A B C D h a) A, B. C. D b) C. A, B. D C) D. B. C. A d) B. A, C. D e) none of these4. A particle moves along the x axis under the influence of a conservative force. If the potential energy is given by the following U(x) =-(21/m')x* + (1Jm )/x3 , what is the conservative force? a) (8N/m')x / + (2Jm) /x' i b) - (8N/m' ) x' /- (2Jm) / xi c) ( 1/2 J/m' ) x 1 - (2Jm) /xi d) (2/5 J/m') x /+ (2 Jm) / xi e) none of these