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(c) An object of mass 20 kg, initially at rest, falls 15 m through the air. Its final speed is 16 m s-1. Find the energy transfer by working, for the object (due to air resistance), assuming no heat transfer or internal energy changes (d) Gas with pressure 105 Pa is contained in a cylinder of cross-sectional area 0.1 m2. One end of the cylinder is fixed. Volume can be varied by moving a piston which is at distance x from the fhxed end. If the gas undergoes isobaric compression, causing energy transfer by working, for the gas, of +5 x 103 J, find A.r, the change in position of t (e) An object of mass 20 kg is initially at rest at height ho 0 m. It is pushed vertically upward by an external force of magnitude 500 N then released at height h resistance or other effects. 2 m. Find the maximum height h2 reached, assuming no aircan I have a valid explanation of C, E ( CLEAR HANDWRITING) AND DETAILED SOLUTION

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d= is m Consi duri no air rulfhnu tal 2. 5 ep1

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