Max m SECTION 1 Answer all questions max marks 20 assume g 10 m s If required 1 A straight line represents uniform velocity acceleration in the distance time velocity time graph 2 2 The area under the V T graph represents for uniform acceleration motion only both uniform and non uniformly accelerated motion 2 3 A 20N force acts on moving body for 5s to bring it to rest What was the a initial momentum of the body and b the momentum 3s later 3 4 An opposing force of F acts on a mass M travelling with a velocity V How long does it take to stop the body Express your answer in terms of F M and V 2 5 What would be the acceleration of a body which is acted upon which is equal to half its weight 2 6 The gravitational force between two objects is 50 dynes when the separation between them is 1 2m What would be the force when the distance is increased to 6m 2 7 A vessel is filled to a level of 45 cm The pressure exerted on the wall at a point 20 cm from the base is 75 Pa What is the pressure X exerted on the floor 3 a force 20 cm 75 Pa Xw Pa 8 State one important reason for the atmospheric pressure to decrease drastically as we go up 1 9 The relative density of Mercury is 13 6 What is its density in Sl units 1 g cc 10 A body experiences an upthrust of 100gf when fully submerged in a liquid of density 1 25 What is the density of a liquid in which it experiences an upthrust of 150gf when fully 45 cm