a block of mass In = 2.5 kg slides head on
into a spring of spring constant k = 320 N/m. When the block
stops, it has compressed the spring by 7.5 cm. The coefficient of kinetic
friction between block and floor is 0.25. While the block is in
contact with the spring and being brought to rest, what are (a) the
work done by the spring force and (b) the increase in thermal energy
of the block-floor system? (c) What is the block's speed just
as it reaches the spring?

Question

a block of mass In = 2.5 kg slides head on
into a spring of spring constant k = 320 N/m. When the block
stops, it has compressed the spring by 7.5 cm. The coefficient of kinetic
friction between block and floor is 0.25. While the block is in
contact with the spring and being brought to rest, what are (a) the
work done by the spring force and (b) the increase in thermal energy
of the block-floor system? (c) What is the block's speed just
as it reaches the spring?

mos1635 · Answer

|dw:1334430485498:dw|