Evan Toh
Object is released and free-falling. Time taken to fall vertically from P to Q?
Keep in mind that you can utilize the two main concepts of a speed-time graph. As object is under free-fall, the acceleration (the...
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Evan Toh
Oct 231 min read
Displacement-time and Velocity-time Graph of Ball Thrown Up / Ball Dropped
1) When a ball is thrown up and it comes down When the ball leaves the hand, there is no upward force acting on the ball. The only force...
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Evan Toh
Jan 11 min read
Kinematics graphs of ball thrown up and come down
When a ball is thrown up vertically from a height and the falls to the ground, the various kinematic graphs below shows the same motion...
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Evan Toh
Jan 11 min read
Interpreting distance-time graph and speed-time graph
Think of gradient as the steepness of a slope as you climb to the right (as time increases). 1) If it is getting steeper > increasing...
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Evan Toh
Dec 31, 20231 min read
Distance-time and Speed-time graph of 2 objects in motion
The distance-time (displacement-time) graph on the left is not related to the speed-time (velocity-time) graph. Both are of difference...
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Evan Toh
Dec 31, 20230 min read
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Evan Toh
Dec 31, 20230 min read
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Evan Toh
Dec 31, 20231 min read
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...
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Evan Toh
Nov 30, 20231 min read
Car A and Car B – Find the time one overtakes the other
The speed-time graph of Car A and Car B, along a straight road over 4 seconds is shown below. a) Calculate the acceleration of Car A and...
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Evan Toh
Nov 30, 20231 min read
Dynamics and kinematics: Force-time graph, find frictional force
A 10 kg box is initially at rest on a rough horizontal surface and a horizontal force is then applied to it. The force varies as shown in...
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Evan Toh
Nov 30, 20231 min read
Ball thrown vertically up from building and falls to ground
A rock is thrown vertically upwards with a velocity of 29.4 m/s from the top of a building 78.4 m high. After how long will the rock...
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Evan Toh
Nov 30, 20231 min read
Kinematics – Two balls free-fall with different mass and height
Solutions: Option B Key concepts: Both balls are free-falling, hence both will experience the same acceleration due to gravity 10 m/s2.
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Evan Toh
Nov 30, 20231 min read
Kinematics Question – Using gradient and area under graph
Solutions: Option B
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