2-8. The
force acting on a block of 20 kg is shown in the graph. At 
, the speed of the block is 
. The coefficient of kinetic friction between the block and
ground is 
. Determine the distribution of the speed of the block when 
.
Solution:
2-8. The
force acting on a block of 20 kg is shown in the graph. At , the speed of the block is . The coefficient of kinetic friction between the block and
ground is . Determine the distribution of the speed of the block when .
Solution: