A-Level Physics: AQA Year 1 & 2 Exam Practice Workbook - includes Answers: superb for the 2024 and 2025 exams (CGP AQA A-Level Physics)

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a As represented in the diagram of a solid, each atom is in contact with a number of neighbouring atoms. The extension x of a spring is related to the load F by F = kx, where k is the force constant (provided Hooke’s law is obeyed). a Explain how a stationary wave is formed on the guitar string from a progressive wave travelling along the string.

The x-axis measures time so find the number of divisions or squares for one cycle and then use the ‘timebase’ of 0. b Explain why the initial rate of evaporation of the water in beaker B is greater than that of the water in beaker A.

The potential divider Sometimes it is useful to calculate voltage by using the principle of a potential divider.

ii State whether the frequency of the vibrator must be increased or decreased to form the same stationary wave pattern on the string as shown in the diagram. b What does the word ‘smooth’ suggest to you about the frictional force on the child when she goes down the slide?In fact, the pressure at the surface of the liquid is atmospheric pressure, due to the atmosphere above.

Remember that field lines always enter a charged surface at right angles; also, remember the direction of the arrows on field lines. d Check that you get the same answer to c using the equation: TIP Because the four suvat equations are connected to each other, you can usually find a way of using an alternative equation to check an answer. A student lists some of the properties of α-particles, β− -particles, β+ -particles and γ-radiation.

You can also find points on the left-hand side where the path difference is such that Q is further than P from the point chosen. m. a Calculate the gravitational force on a mass of exactly 1 kg on the surface of the Moon (gravitational constant G = 6. Copy and complete the table, determining the missing amplitudes and intensities, in terms of A 0 and I0. A charged sphere can be considered to behave like a point charge where all of the charge is concentrated at the centre of the sphere. More about phase difference This exercise focuses on phase difference and how it can be shown in wave diagrams.