Evan Toh
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
Minimum force to lift a drum over a step (different examples)
Given that the mass of the drum is 20 kg. What is the minimum force, F, required to just movee th drum off the ground? (Assume uniform...
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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
Find atmospheric pressure using 2 scenarios of capillary tube with mercury horizontal and vertical
A uniform capillary tube closed at one end, contained air trapped by a thread of mercury 85 mm long. When the tube was held horizontal,...
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Evan Toh
Nov 30, 20231 min read
Liquid pressure – U-tube manometer question
A U-tube with 30 cm of water is set up vertically and 12 cm of olive oil is poured carefully into the left-hand limb of the tube as shown...
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