Edexcel iGCSE Physics (4PH1) 1.1 Units Exam Style Question Paper 2B - New Syllabus

Edexcel iGCSE Physics (4PH1) Paper 1B - All Chapters

Question 

(a) The boxes show some physical quantities and their units. Draw a straight line from each physical quantity to its correct unit. One has been done for you.

(b) Some physical quantities are scalars and other physical quantities are vectors.

(i) State the difference between a scalar quantity and a vector quantity.

(ii) Give an example of a scalar quantity.

Syllabus Topic Codes (Edexcel International GCSE Physics 4PH1):

• 1.1: Physical Quantities and Units — part (a)
• 1.2: Scalars and Vectors — part (b)
▶️ Answer/Explanation

(a) Physical quantities and units

Draw each line to connect the physical quantity to its correct unit, as shown in the completed mark-scheme diagram.

(b)(i) Scalars and vectors

A scalar quantity has magnitude only, whereas a vector quantity has both magnitude and direction.

(b)(ii) Example of a scalar quantity

Any correct scalar quantity is acceptable, for example mass, time, distance, or speed.

Question 

A squash ball is made of rubber and used to play a game called squash.

A student observes that the squash ball bounces higher after its temperature increases. The student designs an investigation to see how the temperature of the ball affects the maximum height after it bounces.

(a) State the independent and dependent variables in the student’s investigation.

(b) The diagram shows the ball at its maximum height after it bounces. Determine the distance the ball moves from the floor to its maximum height. Assume the ball does not change shape when it bounces.

[1 cm on diagram = 4 cm in laboratory]

(c) Design a method that the student could use to investigate how the temperature of the ball affects the maximum height after it bounces. Your answer should include details of

• apparatus needed
• measurements required
• control variables

You may draw a diagram to support your answer.

Syllabus Topic Codes (Edexcel International GCSE Physics 4PH1):

• 1.5: Core Practical: Investigating Motion — parts (a)–(c), investigation and measurement skills
• 1.1–1.2P: SI Base and Derived Units — part (b), measurement and use of length units
▶️ Answer/Explanation

(a) Variables [2 marks]

Independent variable: the temperature of the squash ball.

Dependent variable: the maximum height of the ball after it bounces.

(b) Determining the height [2 marks]

Measure the distance from the floor to the bottom of the ball at its maximum height.

From the diagram, the measured distance is approximately:

\(6.2\,\mathrm{cm}\)

Using the scale \(1\,\mathrm{cm}\) on the diagram \(=4\,\mathrm{cm}\) in the laboratory:

\(\mathrm{height}=6.2\times4\)

\(\mathrm{height}=24.8\,\mathrm{cm}\)

\(\boxed{\mathrm{height}=24.8\,\mathrm{cm}}\)

(c) Investigation method [6 marks]

Apparatus:

  • A ruler or tape measure to measure the bounce height.
  • A water bath and thermometer to control and measure the temperature of the squash ball.

Measurements:

  • Use a suitable range of temperatures for the ball.
  • At each temperature, drop the ball and measure the maximum height of its first bounce.
  • Measure the height with the ruler at eye level to reduce parallax error.
  • Repeat the measurement at each temperature and calculate a mean.

Control variables:

  • Keep the height from which the ball is dropped the same.
  • Use the same surface for the ball to bounce on.
  • Ensure the ball is released under the same conditions each time, without an additional push.
  • Use multiple copies of the same type of ball, if available, to ensure the balls have the same properties.

The results could then be compared by examining how the mean maximum bounce height changes with the temperature of the ball.

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