A compressed spring of force constant 486.4 N/m is used to frictionlessly accelerate a block of mass 2.17kg. Upon leaving the spring , at the spring's relaxed length, the block travels over a horizontal surface having a friction coefficient of 0.345 for a distance of 4.836 m where it stops. a) What mechanical energy is dissipated by the frictional force in stopping the block? b) What was the maximum kinetic energy of the block? c) Through what distance was the spring compressed?