Physics Annual Examinations For Secondary Schools Form 5 - Directorate For Quality And Standards In Education, 2014 Page 2
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11Section A: This section has 7 questions. Each question carries 10 marks (70 marks).
1. Miriam wanted to find the density of a liquid from the measurements shown below.
Mass of measuring cylinder
Mass of measuring cylinder and liquid
Volume of liquid
3
(g)
(g)
(cm
)
200
360
80
a) Define density.
________________________________________________________________________[2]
b) Which instrument did Miriam use to measure mass?
________________________________________________________________________[1]
c) Calculate the mass of liquid in grams.
________________________________________________________________________[1]
d) Calculate the density of the liquid.
________________________________________________________________________[2]
e) Name ONE precaution that the student should take during such an experiment.
________________________________________________________________________[2]
3
f) Miriam places a glass block of density 2.6 g/cm
in the liquid.
i) Would the glass block float or sink in this liquid? ____________________________ [1]
ii) Give a reason for your answer.
_____________________________________________________________________[1]
2. The diagram below shows a box on a rough surface. It
A = 5 N
is being pulled by a string with a force A = 5 N. The
B = 3 N
force acting between the box and the surface, B = 3 N.
a) Name the force A in the string. ______________________________________________ [1]
b) Name the force B between the box and the ground. ______________________________ [1]
c) Forces are vector quantities. Explain what is meant by the term vector quantity.
________________________________________________________________________[2]
d) Calculate the resultant force acting on the object.
________________________________________________________________________[1]
e) State the direction of the resultant force. _______________________________________ [1]
f) Given that the mass of the object is 0.5 kg, calculate its acceleration.
________________________________________________________________________[2]
g) State whether the box will travel at constant speed, accelerate or decelerate when:
i) Force A is reduced to 3 N, ______________________________________________ [1]
ii) Force A is removed completely. __________________________________________ [1]
Physics – Secondary Schools - Track 2 – Form 5 – 2014
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