Two cars are driving next to each other with the same velocity. One has a mass of 500kg, the other has a mass of 800kg. Which car has more Kinetic Energy? A: both cars have the same kinetic energy

B: the 500kg car

C: the 800kg car

D: impossible to tell with the given information

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