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Physics Question Paper

Physics

Course:Secondary Level

Exam Year:2009

ST MARY'S BOYS HIGH SCHOOL

TERM TWO

DATE:19/7/2010

PHYSICS

INSTRUCTIONS:
1.Don't use pencil in your answer sheet.
2.All questions are compulsory.
3.Read all questions carefully.
Q.1.Explain what is meant by the terms streamline flow and turbulen flow. (4 marks)
Q.2.When a strong wind blows over a gently sloping iron roof a building,the roof is likely to be blow off.Explain this observation.
(5 marks)
Q.3.When spraying a field with water using a hosepipe,it is a common to reduce the pipe's opening inorder for water to reach the furthest point.Explain how this is achieved.
(2 marks)
Q.4.Two pipes of uniform cross-sectional area are jointed together. The large pipe has a cross-sectional area of 4cm2 and the small one 1cm2. Water flows out at the rate of 4.8cm3/s.What are the speeds of water in each of two pipes?
(2 marks)
Q.5.A lawn sprinkler has 40 hole each of cross-sectional area 0.04cm2 and is connected to hosepipe of cross-sectional area 4.8cm2.If the speed of the water in the hosepipe is 0.3m/s,determine the speed of the water as it emerges from the holes. (5 marks)
Q.6.1000g of oil flows through a tube of uniform cross-sectional is 5 s. Determine the rate of flow of the oil given that the density of oil is 1.2kg/m3.
(5 marks)
Q.7.W ater flows into a pipe of varying cross-sectional.The inlet has a diameter of 10cm.Given that the liquid leaves the pipe at the rate of 0.008m/s,Calculate its inlet velocity.(5 marks)
Q.8.Define the terms displacement,speed and velocity.
Q.9.A force of 15 N acts on a body of mass 45kg resting on frictionless horizontal ground. Determine :
a)the acceleration of the body. (2 marks)
b)the distance the body travels in 2.5 s.(2 marks)
Q.10.A golfer hits a golf ball with a club exerting a force of 80 N on the ball.If the club is in contact with the ball.If the club is in contact with the ball for 0.12 s and the mass of the ball is 150g.What speed does ball acquire.
(5 marks)
Q.11.Two trolleys travelling in the same direction have masses of 1.3kg and 1.5kg.The trolleys have velocities of 3m/s and 3.5m/s respectively.If the two trolleys collide and stick together,what is the resulting velocity?
(5 marks)
Q.12.A gun of mass 10kg fires a bullet of mass 30g at speed of 500m/s.What is the recoil velocity of the gun? (5 marks)

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