The diagram below shows a track, ABC. The curved section, AB, is frictionless. The rough horizontal section, BC, is 8 m long. P (26 8 m B C An object of mass 10 kg is released from point A which is 4 m above the ground. It slides down the track and comes to rest at point C. 1.1 Define the concept "Work" as applied in Physics (2) 1.2 Draw a free-body diagram showing all the forces acting on the object while on the middle of the curved section AB (ie P). (3) 1.3 Calculate: 1.3.1 the work done on the 10 kg object by the gravitational force on Point P(the middle of the curved section AB). (3) 1.3.2 the magnitude of the frictional force exerted on the object as it moves along BC,given the coefficient of kinetic friction as 0,5. (3) 1.3.3 the work done by the frictional force while on BC. (3) 1.3.4 the length of AQ (3) (17)
