Hannah pushes a full recycling bin along a sidewalk using a horizontal force of 300 N [E].

a) How far could she push the bin if she did 2.7 kJ of work?

b) How much work does the force of gravity do on the bin as Hannah pushes it?

Explain your answer.

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