Depending upon angle of inclination it will vary increase or decrease)(iv) Can't be determinedSECTIONC(All questions are compulsory. In case of internal choices, attempt any one)17. A circular plate or uniform thickness has a diameter of 56 cm. A circular portion of diameter 42 cmis removed from one edge of the plate. Find centre of mass of the remaining portion.18. Derive an expression for magnitude of centripetal acceleration.19. State four assumptions on which kinetic theory of gas is based.20. Applying the first law of thermodynamics, derive Mayer's Formula.ORDerive the work done in case of an adiabatic process.21. State and prove work-energy theorem for a variable force.22. Differentiate between ductile and brittle materials on the basis of stress-strain curve.ORProve Archimedes Principle.23. Suppose the gravitational force varies inversely as the nih power of distance. Then, find theexpression for the time period of a planet in a circular orbit of radius r around the sun.24. A bullet of mass 0.01 kg is fired horizontally into a 4 kg wooden block at rest on a horizontalsurface. The coefficient of the kinetic friction between the block and the surface is 0.25. The bulletgets embedded in the block and the combination moves 20 m before coming to rest. With whatspeed did the bullet strike the block?ORThe rear side of a truck is open and a box of 40 kg mass is placed 5 m away from the open end. Thecoefficient of friction between the box and the surface below it is 0.15. On a straight road, the truckstarts from rest and accelerates with 2 ms-2. At what distance from the starting point does the boxfall off the truck?25. Derive by the method of dimensional analysis, an expression for the volume of a liquid flowing outper second through a narrow pipe. Assume that the rate of flow of liquid depends onthe coefficient of viscosity n of the liquidthe radius r of the pipe and​