664868
| Question | Answer |
| Mechanics | Revision |
| In terms of u and t s= | ut+ 1/2 at^2 |
| In terms of v, a and t s= | vt- 1/2 at^2 |
| In terms of u,v and t s= | 1/2 (u+v)t |
| In terms of u, a and t v= | u+ at |
| In terms of v, a and s u^2= | v^2 -2as |
| In terms of u, a and s v^2= | u^2 +2as |
| s= u= v= a= t= | Displacement / Distance Initial Velocity Final / Second Velocity Acceleration Time |
| The Moment of a Force about a point is.... | the magnitude of the force multiplied by the perpendicular distance from the point to the force or the line of action of the force |
| A anticlockwise moment is A Clockwise moment is | Positive Negative |
| Moment of a Force= | Force * Perpendicular Force |
| Distance from Point to Centre of Mass in x or y direction= | (Sum of (Mass*Distance from point))/ Sum of Masses |
| If a body if suspended the centre of mass will be | Directly below the point of suspension |
| Kinetic Energy = | 1/2 m v^2 |
| Work Done = | Force * Distance cosθ |
| Gravitational Potential Energy= | Mass * Gravity * Height mgh |
| λ= l= x= | Modulus of Elasticity Natural Length Extension of string/spring |
| T= | λx / l |
| Elastic Potential Energy= | λ e^2 /2l |
| Power = | Work Done / Time Taken |
| Work done by a variable force = | ∫F(x)dx |
| v = | dx/dt |
| a = | dv / dt |
| v = | ∫a dt |
| s = | ∫v dt |
| r = | xi + yj + zk |
| 1 rpm = | 2π / 60 rad s^-1 |
| v = | rω |
| a = | rω^2 |
| a = | v^2 / r |
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