iGCSE Physics (Triple) Edexcel
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63 topics in 8 modules
☑️ Forces and Motion 13 topics
- Forces and Motion: Velocity and Acceleration
- Forces and Motion: Distance-Time Graphs
- Forces and Motion: Velocity-Time Graphs
- Forces and Motion: Mass, Weight and Gravity
- Forces and Motion: Forces and Friction
- Forces and Motion: The Three Laws of Motion
- Forces and Motion: Combining Forces
- Forces and Motion: Terminal Velocity
- Forces and Motion: Hooke's Law
- Forces and Motion: Stopping Distances
- Forces and Motion: Momentum and Collisions
- Forces and Motion: Turning Effects and Centre of Gravity
- Forces and Motion: Principle of Moments
☑️ Electricity 8 topics
- Electricity: Circuits
- Electricity: Resistance
- Electricity: LDRs, Thermistors and LEDs
- Electricity: Series and Parallel Circuits
- Electricity: Charge, Voltage and Energy Change
- Electricity: Electrical Safety
- Electricity: Energy and Power in Circuits
- Electricity: Static Electricity
☑️ Waves 7 topics
- Waves
- Waves: Wave Behaviour
- Waves: Electromagnetic Waves
- Waves: Reflection and Refraction
- Waves: Refractive Index
- Waves: Snell's Law
- Waves: Sound Waves
☑️ Energy Resources and Energy Transfer 11 topics
- Energy Resources and Transfer: Conservation of Energy
- Energy Resources and Transfer: Efficiency
- Energy Resources and Transfer: Energy Transfers
- Energy Resources and Transfer: Sankey Diagrams
- Energy Resources and Transfer: Energy Transfer by Heating
- Energy Resources and Transfer: Convection
- Energy Resources and Transfer: Work and Power
- Energy Resources and Transfer: Kinetic and Potential Energy Stores
- Energy Resources and Transfer: Non-Renewable Energy and Power Stations
- Energy Resources and Transfer: Nuclear, Wind and Geothermal Power
- Energy Resources and Transfer: Solar, Water and Wave Power
☑️ Solids, Liquids and Gases 5 topics
- Solids, Liquids and Gases: Density and Pressure
- Solids, Liquids and Gases: Changes of State
- Solids, Liquids and Gases: Temperature and Particle Theory
- Solids, Liquids and Gases: Particle Theory and Pressure in Gases
- Solids, Liquids and Gases: Specific Heat Capacity
☑️ Magnetism and Electromagnetism 7 topics
- Magnetism: Magnets and Magnetic Fields
- Magnetism: Electromagnetism
- Magnetism: The Motor Effect
- Magnetism: Electric Motors
- Magnetism: Loudspeakers
- Magnetism: Electromagnetic Induction
- Magnetism: Transformers
☑️ Radioactivity and Particles 6 topics
- Radioactivity and Particles: Radioactivity
- Radioactivity and Particles: Ionising Radiation
- Radioactivity and Particles: Half-Life
- Radioactivity and Particles: Nuclear Radiation
- Radioactivity and Particles: Nuclear Fission
- Radioactivity and Particles: Nuclear Fusion
☑️ Astrophysics 6 topics
- Astrophysics: The Universe
- Astrophysics: Gravity and Orbits
- Astrophysics: Stellar Evolution
- Astrophysics: Classifying Stars
- Astrophysics: Red-Shift
- Astrophysics: The Big Bang
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iGCSE Physics (Triple) Edexcel Revision Content
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iGCSE Physics (Triple) Edexcel - Forces and Motion - Forces and Motion: Velocity and Acceleration Content Preview
Forces and Motion
Forces and Motion: Velocity and Acceleration
- Velocity: Velocity is a vector quantity, which means it has both magnitude (speed) and direction. It is often described as the speed in a given direction.
- Measuring Velocity: Velocity can be calculated using the formula v = s/t, where 'v' is velocity, 's' is displacement (distance moved in a specific direction) and 't' is time.
- Uniform Velocity: When an object's velocity remains constant, it is said to have uniform velocity. In this case, the object covers equal distances in equal time intervals.
- Acceleration: Acceleration is a measure of how rapidly an object's velocity is changing. It is a vector quantity, meaning it also has both magnitude and direction.
- Measuring Acceleration: Acceleration can be calculated using the formula a = (v-u)/t, where 'a' is acceleration, 'v' is final velocity, 'u' is initial velocity and 't' is time taken.
- Positive Acceleration: Positive acceleration indicates an increase in velocity. When an object is speeding up, it is accelerating.
- Negative Acceleration: Negative acceleration, also referred to as deceleration, signifies a reduction in velocity. When an object is slowing down, it is decelerating.
- Non-uniform Acceleration: If the rate of change of velocity is not constant, the object is said to be experiencing non-uniform acceleration.
- Graphical Representation: Velocity-time graphs can depict motion. Uniform velocity is represented by a horizontal, straight line while a sloped line indicates acceleration or deceleration. The rate of acceleration or deceleration corresponds to the steepness of the slope.
- Acceleration due to Gravity: When an object is in freefall, it accelerates due to gravity. This acceleration is approximately 9.8 m/s^2 towards the Earth's centre.
- Finally, the second law of motion explains how force, mass, and acceleration are related. It states that the force applied on an object is equal to the mass of the object multiplied by its acceleration (F = ma). This relationship shows that if a force is applied on an object, it will accelerate.
Question: A car travels at a steady speed of 20 m/s for 15 seconds, before accelerating at 5 m/s^2 for the next 10 seconds. What will be the car's final velocity after this period of acceleration?
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