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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TIP If a question about circular motion seems unclear, draw a diagram of the circle and angles involved to help your understanding. For two objects, we can represent the conservation of momentum as an equation: m1u1 + m2u2 = m1v1 + m2v2 This exercise provides practice in using this equation. Remember that ‘decelerating’ means that the car’s velocity is decreasing; its acceleration is negative.

It is equal to the voltage lost across the source due to internal resistance potential divider: a circuit in which two or more components are connected in series to a supply; the output voltage is taken across one of the components potentiometer: a device used to compare potential difference or e. ii Calculate the speed of an α-particle which has approximately the same energy as the β− -particle. The light from the two slits is still coherent, even though it is now white and contains a mixture of wavelengths. d Calculate the same quantity using the equation: change in gravitational potential energy = mgh Do you get the same answer as you did for part c?d Using the idea of conservation of energy, calculate the thermal energy produced in the resistor R in 10 s. Subject to statutory exception and to the provisions of relevant collective licensing agreements, no reproduction of any part may take place without the written permission of Cambridge University Press. Terminal velocity When an object moves through a fluid, such as air or water, it experiences an additional drag force. c In an attempt to determine g using projectile motion, a student fires a metal ball with an initial velocity of 12.

TIP When using tickertape timers, think about whether to count the dots or the spaces between the dots. e Suggest why having lines as far apart as this for a diffraction grating experiment is not suitable.A loudspeaker which emits a note of frequency 300 Hz is whirled in a horizontal circle at a speed of 20 m s −1. Four electrical quantities are: charge, current, potential difference, resistance State which quantity in the list: a can be measured in joules per coulomb b equals the product of two other quantities in the list c equals the rate of change of another quantity in the list d is a base quantity in the S. A student lists some of the properties of α-particles, β− -particles, β+ -particles and γ-radiation.