Ablock of mass m=0.750 kg is fastened to an unstrained horizontal spring whose spring constant is k=82.0 n/m. the block is given a displacement of +0.120m, where the + sign indicates that the displacement is along the +x axis, and then released from rest. c) what is the maximum speed of the block? group of answer choices

Acarpenter is driving a 15.0-g steel nail into a board. his 1.00-kg hammer is moving at 8.50 m/s when it strikes the nail. half of the kinetic energy of the hammer is transformed into heat in the nail and does not flow out of the nail. what is the increase in temperature of the nail after the three blows that the carpenter needs to drive the nail in completely? the specific heat of steel is 448 j/kg ∙ k. a) 2.7 k b) 1.8 k c) 7.7 k d) 8.1 k e) 3.6 k