A block moves on a frictionless track

PHYSICS · Subjective · AP · Physics 1: Algebra-based · Work Energy and Power · Work Energy and Power

Problem

0.60\,\text{kg}

block moves on a frictionless track. At point A it is

0.30\,\text{m}

above the chosen reference level and has a speed of

2.5\,\text{m}\,s^{-1}

. The block then moves to point B, which is

0.10\,\text{m}

below the reference level, where it compresses a horizontal spring by

0.12\,\text{m}

and momentarily stops. Determine the force constant of the spring.