spring question.png A 2.50 kg mass is sliding along a rough …

spring question.png A 2.50 kg mass is sliding along a rough  level, surface of coefficient of kinetic friction of 0.350 between the mass and the surface, when it encounters a spring of spring of spring constant 125 N/m.  If the mass is traveling at 1.20 m/s when it contacts the spring determine by how much the spring compresses in stopping the mass.

up incline.png A block is shot up an the above incline with…

up incline.png A block is shot up an the above incline with an initial speed of 12.0 m/s.  It slides up the ramp and then back down.  If the coefficient of kinetic friction between the block and the incline is 0.40 will be the speed of the block when it slides back down to the bottom of the ramp?