Questions
Q1.
Magma consists of molten rock and gas and is found beneath the surface of the Earth. During a volcanic
eruption the magma rises to the surface and pours through an opening in the Earth's crust. As the magma
rises, the pressure decreases and bubbles of gas expand and rise through the magma.
Explain why the bubbles rise faster through the magma as they start to expand.
(3)
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(Total for question = 3 marks)
(Q14a 6PH01/01, June 2017)
Q2.
Select one answer from A to D and put a cross in the box ( )
The graph shows how velocity varies with time for an object.
The acceleration at 3 s is
A 10 m s−2
B 7 m s−2
C 5 m s−2
D 0 m s−2
(Total for Question = 1 mark)
(Q09 6PH01/01, June 2009)
Q3.
Select one answer from A to D and put a cross in the box ( )
The graph shows how velocity varies with time for an object.
The total distance travelled by the object in 4 s is
A 20 m
B 40 m
C 60 m
D 80 m
(Total for Question = 1 mark)
(Q08 6PH01/01, June 2009)
Q4.
(a) State what is meant by centre of gravity.
(1)
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(b) The picture shows a snooker cue. It is made from wood of uniform density and takes the form of a rod
with decreasing diameter towards one end.
(i) On the picture, mark the position of the centre of gravity of the snooker cue.
(1)
(ii) State a simple method to test if this is the correct position.
(1)
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(Total for Question = 3 marks)
(Q12 6PH01/01, June 2013)
Q5.
* (a) Explain the difference between scalar and vector quantities.
(1)
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(b) When asked to run one complete lap around a track, a student says, "However fast I run, my
average velocity for the lap will be zero".
Comment on his statement.
(3)
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(Total for Question = 4 marks)
(Q11 6PH01/01, June 2009)
Q6.
An exhibit in a science museum requires the observer to use a pump to create air bubbles in a column of
liquid. The bubbles then rise through the liquid.
(i) Complete the free-body force diagram for a bubble as it rises through the liquid.
(3)
*(ii) It is observed that larger bubbles reach the top of the column of liquid in less time than smaller
bubbles.
By considering the forces acting on a bubble as it rises, explain this observation.
(3)
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(Q19a 6PH01/01, June 2015)
Q7.
Metrology is the science of measurement and World Metrology Day is May 20th. In 2010, the day was
used to celebrate the 50th anniversary of the SI system.
A metrologist from the National Physical Laboratory said on a radio programme that the SI system uses
units that everyone can understand. He stated the following example.
"If you hold an apple in your hand it's about a newton, if you raise it through one that's about a joule
and if you do it in one second that's about a watt."
Assuming that the apple has a mass of 100 g, explain and justify the statements made about the three
words in italics.
(6)
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(Total for Question = 6 marks)
(Q13 6PH01/01, June 2012)
Q8.
The correct definition of the term centre of gravity is the point at which
A all of the force acts on a body.
B gravity acts on a body.
C the weight of a body may be considered to act.
D the weight is concentrated.
(Total for question = 1 mark)
(Q02 6PH01/01, June 2015)
Q9.
Physical quantities can be vectors or scalars.
Describe what is wrong with each of the following statements.
(3)
A car has a mass of 10 000 N acting vertically downwards.
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The velocity of light from the Sun is 3 × 108 m s−1.
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The car slowed down with an acceleration of 2.5 m s−2.
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(Q14a 6PH01/01, June 2015)
Q10.
* You are asked to determine the acceleration of free fall at the surface of the Earth, g,
using a free fall method in the laboratory.
(a) Describe the apparatus you would use, the measurements you would take and explain
how you would use them to determine g.
(6)
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(b) Give one precaution you would take to ensure the accuracy of your measurements.
(1)
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(Total for Question = 7 marks)
(Q15 6PH01/01, Jan 2009)
Q11.
A ball is dropped from a height of 1.3 m. The graph shows how the height above the ground varies with
time for several bounces.
How can the velocity of the ball at time t = 2.5 s be determined from the graph?
A Calculate the area between the graph and the time axis up to t = 2.5 s.
B Divide the displacement at t = 2.5 s by 2.5 s.
C Divide the height at t = 2.5 s by 2.5 s.
D Draw a tangent to the graph at t = 2.5 s and calculate its gradient.
(Total for Question = 1 mark)
(Q05 6PH01/01R, June 2013)
Q12.
The graph is a displacement-time graph for a runner.
The velocity of the runner at 5 s is approximately
A 8 m s−1
B 9 m s−1
C 12 m s−1
D 40 m s−1
(Total for question = 1 mark)
(Q09 6PH01/01R, June 2014)
Q13.
A ball is dropped, bounces once at time and is then caught at time t.
The velocity-time graph for the motion of the ball is shown.
Assuming that the initial displacement of the ball is 0, which is the correct displacement-time graph for the
motion of the ball?
(Total for question = 1 mark)
(Q07 6PH01/01, June 2017)
Q14.
A ball is dropped, bounces once and is then caught.
Which of the following is the correct displacement-time graph for the ball?
A
B
C
D
(Total for question = 1 mark)
(Q03 6PH01/01, June 2016)
Q15.
The photograph shows a wind turbine. Kinetic energy of the wind is transferred to electrical energy by the
turbine as the blades rotate.
(a) Explain why we can say that the wind is doing work on the blades.
(2)
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(b) The area swept out by one blade, as it turns through 360°, is 6000 m2. Wind at a speed of 9 m s−1
passes the turbine.
(i) Show that the volume of air passing through this area in 5 seconds is about 300 000 m 3.
(2)
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(ii) Calculate the mass of this air.
density of air = 1.2 kg m-3
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Mass = ...........................................................
(iii) Calculate the kinetic energy of this mass of air.
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Kinetic energy = ...........................................................
(c) Suggest a reason why it is not possible to usefully transfer 100% of the kinetic energy of the wind.
(1)
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(Q18 6PH01/01, Jan 2012)
Q16.
A student investigates the effect of varying the stretching force applied to the elastic waistband of some
trousers.
The graph produced by the student shows the stretching force against extension for the elastic waistband.
The top line was recorded as the force increased and the lower line as the force decreased.
(a) Explain whether the elastic waistband obeys Hooke's Law.
(2)
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(b) Show that, in this investigation, the work done on the elastic waistband in stretching it is less than 3 J.
(2)
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(Total for Question = 8 marks)
(Q14 6PH01/01, June 2012)
Q17.
A Slinky is a long spring made of metal. One end of a Slinky is fixed to the ceiling. The force acting on the
Slinky was varied by hanging weights from the other end.
The graph shows the results.
(a) (i) Explain whether the results follow Hooke's law.
(2)
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(i) Explain why the coils are extended more at the top than the bottom.
(2)
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(ii) Mark and label the approximate position of the centre of gravity of the Slinky on the photograph above.
(1)
(iii) A ball is dropped from the same height, and at the same time, as the top of the Slinky is released. The
three photographs below show what happens.
*(1) By considering the forces acting on the top coils of the Slinky, explain why they fall faster than the
ball.
(3)
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(2) Suggest why the bottom coils remain in the same position in the three photographs.
(1)
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(Total for Question = 15 marks)
(Q18 6PH01/01, Jan 2011)
Mark Scheme
Q1.
Q2.
Q3.
Q4.
Q5.
Q6.
Q7.
Q8.
Q9.
Q10.
Q11.
Q12.
Q13.
Q14.
Q15.
Q16.
Q17.
