A horizontal spring is attached to the wall. The spring has a force constant k =1980 N/m and is compressed 0.08 m from its normal length. A block of mass 0.2kg is placed a rest against the spring. The spring is released and the block moves along a horizontal surface, leaving the spring behind. The coefficient of kinetic friction between the block and the surface is uk=0.3. In the sketch, point A is where the block is released and point B is 3m to the right of point A.

a) How much work is done by fiction as the block moves from point A to point B?
b) What is the speed of the block when it reaches point B?

Answer rating: 100% (QA)

Work done by friction F f dx uk F n dx uk mg dx 0 3 0 2 9 8 3 1 884 J b Speed at point ... View the full answer