in the diagram below, both of the identical 2.0 kg blocks areinitially 1.5 meter

Question

in the diagram below, both of the identical 2.0 kg blocks areinitially 1.5 meters above the floor. the first block is allowed tofall directly to the floor while the second block slides down asmooth ramp that is inclined at 25 degree from thehorizontal. a) how much work does gravity do on each block? b) how much work does the normal force do on the secondblock? c) what effects does the normal force have on the speed of thesecond block? what effect does it have on the velocity of thesecond block? d) what is the speed of each block just before it reaches thefloor? please answer all questions in the diagram below, both of the identical 2.0 kg blocks areinitially 1.5 meters above the floor. the first block is allowed tofall directly to the floor while the second block slides down asmooth ramp that is inclined at 25 degree from thehorizontal. a) how much work does gravity do on each block? b) how much work does the normal force do on the secondblock? c) what effects does the normal force have on the speed of thesecond block? what effect does it have on the velocity of thesecond block? d) what is the speed of each block just before it reaches thefloor? please answer all questions

Explanation / Answer

m = 2.0 kg, h = 1.5 m, = 25o a) work done by gravity = mgh = 29.4 J b) work done by the normal force = 0 c) The normal force has no effect on the speed of the secondblock. d) mgh = mv2/2, so v = (2gh) = 5.42 m/s

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