5367957
Description
Flashcards by Jasmine Yap, updated more than 1 year ago
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Created by Jasmine Yap
over 8 years ago
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| Question | Answer |
| Normal Contact Force | A force perpendicular to the surface experienced by a body when it is in physical contact with something else. |
| Hooke's Law | Within the limit of proportionality, the extension produced in a material (x) is directly proportional to the force applied (F). F=kx. |
| Principle of Moments | When an object is in equilibrium, the sum of anticlockwise moments about any point equals the sum of clockwise moments about the same point and there is no resultant force. |
| Archimedes’ Principle | The upthrust experienced by an object partially or entirely immersed in a fluid is equal to the weight of the fluid displaced by the object. |
| Newton's First Law of Motion | A body will continue in its state of rest or uniform motion in a straight line unless an external resultant force acts on it. |
| Newton's Second Law of Motion | The rate of change of momentum of a body is proportional to the resultant force (F) acting on it and the change takes place in the direction of the force, where F=ma or F=∆p/∆t. |
| Netwon's Third Law of Motion | If body A exerts a force on body B, then body B exerts a force of equal magnitude but in the opposite direction on body A. |
| Principle of Conservation of Momentum | The total momentum of a system of objects remains constant provided no resultant external force acts on the system. |
| Work | Mechanical transfer of energy to a system or from a system by an external force on it. W=Fd (W=work in J, F=force in N, d=distance moved by object in m). |
| Power | Rate of work done or energy converted (W) with respect to time (t). P=W/t. |
| Speed | Rate of change of distance traveled with respect to time. (s=d/t) |
| Velocity | Rate of change of its displacement with respect to time. |
| Acceleration | Rate of change of its velocity with respect to time. |
| Reaction time | Time it takes between when the hazard is seen and the response is detected. |
| Thinking distance |
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