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2016PPP1Q5 Camera in space station orbiting the Earth
Answer: Option A Many have the misconception that as the astronaut and camera are floating and weightless, there is no gravitational force acting on them. Actually both are inside the gravitational field of the Earth, and there is gravitational field strength, hence there is gravitational force acting on them towards the Earth. But as together with the station, they are all ‘free falling’, hence no normal contact force on the astronaut and camera, hence give the feeling of we
Evan Toh
1 day ago1 min read
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Velocity-time graph of ball released from rest with air resistance -Part 1
Refer to the video below to understand how to sketch the graph. For O-Level, we just need to focus on the general shape. 2024PP Paper 2...
Evan Toh
Sep 261 min read
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Displacement-time graph and Velocity time graph of a ball thrown and comes down - Part 03
Refer to the video for the explanation. When a ball is thrown up and it comes down, the motion varies. This video will cover how the...
Evan Toh
May 231 min read
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Displacement-time and Velocity-time graph when ball is dropped and it rebounces - with energy lost - Part 02
Refer to the video below for the explanation. When a ball is dropped and it rebounces back, the motion varies. This video will cover how...
Evan Toh
May 231 min read
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Displacement-time and Velocity-time graph when ball is dropped and it rebounces (no energy lost) - Part 01
Refer to the video below for explanation. When a ball dropped and then it re-bounces, the motion varies. This video will cover how the...
Evan Toh
May 231 min read
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Evan Toh
Jan 1, 20240 min read
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Bowling ball and feather in a vacuum room – which drops faster?
In a vacuum room, where is no air resistance, the bowling ball will have the same acceleration as the feather, which is 10 m/s2 on earth....
Evan Toh
Jan 1, 20241 min read
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During impact of a free falling ball, the force on ground is greater than the weight of ball
In this post, it shows a free-falling ball from a height of 1.0 m. During the impact, the direction of the force on the ground is...
Evan Toh
Jan 1, 20241 min read
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Evan Toh
Jan 1, 20240 min read
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Evan Toh
Jan 1, 20240 min read
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Understanding Free-Fall (acceleration due to gravity)
On earth, the gravitational field strength is 10 N/kg and the acceleration due to gravity is 10 ms-2 . That means when you release an...
Evan Toh
Jan 1, 20241 min read
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Kinematics Question – Using gradient and area under graph
Solutions: Option B
Evan Toh
Dec 1, 20231 min read
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