All of IGCSE Physics in 5 minutes (summary)
IGCSE Online・5 minutes read
Different graphs for motion include speed increasing, decreasing, constant, and stationary, with corresponding graphs for acceleration increasing, decreasing, deceleration increasing, and decreasing. Terminal velocity is reached when speed and air resistance balance out, with weight equaling air resistance.
Insights
- The concept of terminal velocity occurs when speed and air resistance reach equilibrium, where weight equals air resistance. Momentum is defined as mass multiplied by velocity, with the direction determining whether momentum is positive or negative. The principle of momentum asserts that the total momentum before a collision equals the total momentum after, with impulse calculated as force multiplied by the time taken.
- Pressure in liquids rises with depth, determined by density, gravity, and height. Boyle's Law establishes an inverse relationship between pressure and volume, while temperature increments lead to higher pressure due to heightened kinetic energy and collisions. Various topics like refraction, diffraction, thermal physics, thermometer properties, heat transfer, light properties, magnetism, and atomic physics are also covered.
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Recent questions
What are the different types of motion graphs?
Speed increasing, decreasing, constant, and stationary.
How is terminal velocity defined?
Speed and air resistance balance out.
What is momentum in physics?
Mass times velocity.
How is pressure in liquids calculated?
Density times gravity times height.
What does Boyle's Law state?
Pressure and volume are inversely related.
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Summary
00:00
Motion, Velocity, Pressure, Momentum, and More
- Different graphs for motion include speed increasing, decreasing, constant, and stationary, with corresponding graphs for acceleration increasing, decreasing, deceleration increasing, and decreasing. To find speed in a distance-time graph, look at the gradient, while for velocity-time graphs, the distance is found by calculating the area under the graph.
- Terminal velocity is reached when speed and air resistance balance out, with weight equaling air resistance. Momentum is mass times velocity, with momentum being positive or negative depending on direction. The principle of momentum states that momentum before a collision equals momentum after, with impulse being force times time taken.
- Pressure in liquids increases with depth, calculated as density times gravity times height. Boyle's Law states that pressure and volume are inversely related, while temperature increases result in higher pressure due to increased kinetic energy and collisions. Refraction, diffraction, thermal physics, properties of a thermometer, heat transfer, light properties, magnetism, and atomic physics are also discussed.
