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Applied Physics Question Paper

Applied Physics

Course:Secondary Level

Exam Year:2011

MAKIMA SECONDARY SCHOOL

END OF TERM TWO

DATE:5/7/2011

TIME:2HRS 30MIN

INSTRUCTIONS:
1.Questions are compulsory.
2.No speaking in exam room.
3.No use of pencil in answer sheet.

Q.1.what is meant by the terms mechanical advantages,velocity ratio and efficiency of a machine? (2 marks)
Q.2. Explain what is a lever and give the essential features of a lever.(2 marks)
Q.3. A lever system of velocity ratio 45 overcomes a load of 4500 N when an effort of 125 N is applied to it.Find:
a)the mechanical advantage of the lever.
(2 marks)
b)the efficiency of the lever.(2 marks)
Q.4.Distimguisg between effort and work. (4 marks)
Q.5.A block and tackle was used to lift a load of 450 N With an effort of 150 N .Determine:
a)the mechanical advantage of the pulley system. (2 marks)
b)the efficiency of the pulley system given that there were 5 pulleys in the blocks and tackle. (2 marks)
P.6.Calculate the work done in a washing machine which has an output power rated at 1.5KW.(5 marks)
Q.7.Write down the energy changes in the following:
a)a smoker striking a match.(2 marks)
b)a carpenter using a hammer to drive in a nail.(2 marks)
Q.8.Draw and label the parts of a simple pulley system with a velocity ratio of 5 and calculate its efficiency when a load of 6000N is lifted with an effort of 1500N. (5 marks)
Q.9.State two properties of cathode rays. (2 marks)
Q.10.What property of cathode rays shows they are particles and not waves? (2 marks)
Q.11.Name the parts of the cathode ray tube (CRT) that make up the electron gun. (2 marks)
Q.12.Explain how electrons are produced in a cathode ray tube.
(2 marks)

Applied Physics Question Paper

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