A 0.56-kg block attached to a spring with force constant 113 N/m is free to move on a frictionless, horizontal surface as in the figure below. The block is released from rest after the spring is stretched 0.13 m. a b x=0 m x=0 m m F, = 0 4x10 x= (a) At that instant, find the force on the block. 167 X magnitude Your response differs from the correct answer by more than 10%. Double check your calculations. N right direction X (b) At that instant, find its acceleration. 29 95 X magnitude Your response differs from the correct answer by more than 10%. Double check your calculations. m/s2 direction left