Physics

Problem

4.0\,\text{kg}

block slides

5.0\,\text{m}

down a straight ramp inclined at

30^{\circ}

to the horizontal. The coefficient of kinetic friction between the block and the ramp is

0.20

. What magnitude of mechanical energy is converted to thermal energy by friction during the slide? (Take

g = 9.8\,\text{m/s}^2

.) a)

20\,\text{J}

98\,\text{J}

34\,\text{J}

39\,\text{J}