Physics Question:

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iitaspirant2009

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Jul 8, 2007, 1:41:37 AM7/8/07

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A cannon is launches a iron ball , making an angle of pi/3 with the
ground with a velocity of 100m/s.
The canon hits the a wall.

a) Calculate the distance of the wall from the cannon , so that the
impact of the iron ball is maximum.

b) If, the mass of the cannon is 100kg, calculate moles of a mixture
of contaning Fe2O3 and FeO in the ratio 2:1.
the mixture on heating, releases Oxygen, which burns C2H6 to burn the
required energy.
1 mole of ethane releases 1561KJ of energy.

c) If the ball strikes a spherical rock of mass 50kg, draw the graph
of velocity vs time of the rock.