(a) In air at 0°C, a 1.60-kg copper block at 0°C is set sliding at 2.50 m/s over a sheet of ice at 0°C. Friction brings the block to rest. Find the mass of the ice that melts.
(b) As the block slows down, identify its energy input Q, its change in internal energy , and the change in mechanical energy for the block–ice system.
(c) For the ice as a system, identify its energy input Q and its change in internal energy.
(d) A 1.60-kg block of ice at 0°C is set sliding at 2.50 m/s over a sheet of copper at 0°C. Friction brings the block to rest. Find the mass of the ice that melts.
(e) Evaluate Q and for the block of ice as a system and for the block–ice system.
(f) Evaluate Q and for the metal sheet as a system.
(g) A thin, 1.60-kg slab of copper at 20°C is set sliding at 2.50 m/s over an identical stationary slab at the same temperature. Friction quickly stops the motion. Assuming no energy is transferred to the environment by heat, find the change in temperature of both objects.
(h) Evaluate Q and for the sliding slab and for the two-slab system.
