UNIVERSITY OF LAGOS(UNILAG) PHYSICS 2005/2006

UNILAG 2005
21. A bus traveling at 15m s-1 accelerates uniformly at 4m s-2. What is the distance covered in 10s?
Answer: _________
22. The volume and pressure of a given mass of gas at 27 0C are 76 cm3 and 80 cm of mercury respectively. Calculate its volume at s.t.p.
Answer: __________
23. A simple microscope forms an image 10 cm from an eye close to the lens. If the object is 6 cm from the eye, calculate the focal length of the lens.
Answer: _________
24. Calculate the work done when a spring of force constant 105 N/m is extended by 0.2m
Answer: __________
Suggested Answers
21. Answer: 350m
22. Answer: 72.8cm3
23. Answer: 3.75cm
24. Answer: 2000N
25. Answer: the path taken
PHYSICS, UNILAG 2006
61. A piece of metal of relative density 5.0 weights 60 N in air. Calculate its weight when frilly immersed in water.
Answer: _________
62. A force acts on a body for 0.5 s changing its momentum from 16.0 kg m s-1 to 21.0 kg m s-1 calculate the magnitude of the force
Answer: ____________
63. The period of an oscillatory motion is defined as
Answer: ________________
64. A platinum resistance thermometer has a resistance of 4 Ω at 0 0C and 10Ω at 100 0C. Assuming the resistance changes uniformly with temperature, calculate the resistance of the thermometer when the temperature is 45 0C.
Answer: ________
66. An object is placed on the principal axis and at the centre of curvature of a concave mirror, is the image of the object formed by the mirror real?.
Answer: ________
67. The direction of induced current in a straight wire placed in a magnetic field is determined by using
Answer: __________
SUGGESTED ANSWERS 2006
61. Answer: 48N
62. Answer: 10.0N
63. Answer: time to complete one oscillation
64. Answer: 6.7
66. Answer: real and inverted
67. Answer: Fleming\'s right hand rule
Please check to be sure.
Thanks.

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David Silva